diff -Naru search_original/documents/assignment_document.php search/documents/assignment_document.php
--- search_original/documents/assignment_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/assignment_document.php	2009-05-30 19:09:25.874207200 +0900
@@ -300,6 +300,10 @@
     }
     $context = get_record('context', 'id', $context_id);
     $cm = get_record('course_modules', 'id', $context->instanceid);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) return false;
+// (Shirai136): Add to here
 
     if (!$cm->visible and !has_capability('moodle/course:viewhiddenactivities', $context)){
         if (!empty($CFG->search_access_debug)) echo "search reject : hidden assignment ";
diff -Naru search_original/documents/chat_document.php search/documents/chat_document.php
--- search_original/documents/chat_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/chat_document.php	2009-05-30 19:10:31.473993600 +0900
@@ -89,6 +89,13 @@
     $course = get_record('course', 'id', $chat->course);
     $coursemodule = get_field('modules', 'id', 'name', 'data');
     $cm = get_record('course_modules', 'course', $course->id, 'module', $coursemodule, 'instance', $chat->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this chat: Course=".$chat->course."/ ChatID=".$chat_id);
+        return array();
+    }
+// (Shirai136): Add to here
     $groupmode = groupmode($course, $cm);
 
     $fromtimeclause = ($fromtime) ? "AND timestamp >= {$fromtime}" : ''; 
@@ -262,6 +269,13 @@
     $cm = get_record('course_modules', 'id', $context->instanceid);
     // $cm = get_coursemodule_from_instance('chat', $chat->id, $chat->course);
     // $context = get_context_instance(CONTEXT_MODULE, $cm->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this chat: ChatID=".$chat_id);
+        return false;
+    }
+// (Shirai136): Add to here
 
     if (!$cm->visible and !has_capability('moodle/course:viewhiddenactivities', $context)){
         if (!empty($CFG->search_access_debug)) echo "search reject : hidden chat ";
diff -Naru search_original/documents/document.php search/documents/document.php
--- search_original/documents/document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/document.php	2009-05-30 19:16:04.021314000 +0900
@@ -18,29 +18,51 @@
 */
 abstract class SearchDocument extends Zend_Search_Lucene_Document {
     public function __construct(&$doc, &$data, $course_id, $group_id, $user_id, $path, $additional_keyset = null) {
+// (Shirai135): The multibyte strings in index files will be broken (2009/05/28)
+// (Shirai135): Add from here
+         $encoding = 'UTF-8';
+// (Shirai135): Add to here
          //document identification and indexing
-         $this->addField(Zend_Search_Lucene_Field::Keyword('docid', $doc->docid));
+// (Shirai135): Modify from here
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('docid', $doc->docid));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('docid', $doc->docid, $encoding));
          //document type : the name of the Moodle element that manages it
-         $this->addField(Zend_Search_Lucene_Field::Keyword('doctype', $doc->documenttype));
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('doctype', $doc->documenttype));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('doctype', $doc->documenttype, $encoding));
          //allows subclassing information from complex modules.
-         $this->addField(Zend_Search_Lucene_Field::Keyword('itemtype', $doc->itemtype));
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('itemtype', $doc->itemtype));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('itemtype', $doc->itemtype, $encoding));
          //caches the course context.
-         $this->addField(Zend_Search_Lucene_Field::Keyword('course_id', $course_id));
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('course_id', $course_id));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('course_id', $course_id, $encoding));
          //caches the originator's group.
-         $this->addField(Zend_Search_Lucene_Field::Keyword('group_id', $group_id));
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('group_id', $group_id));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('group_id', $group_id, $encoding));
          //caches the originator if any
-         $this->addField(Zend_Search_Lucene_Field::Keyword('user_id', $user_id));
+//       $this->addField(Zend_Search_Lucene_Field::Keyword('user_id', $user_id));
+         $this->addField(Zend_Search_Lucene_Field::Keyword('user_id', $user_id, $encoding));
+// (Shirai135): Modify to here
          // caches the context of this information. i-e, the context in which this information
          // is being produced/attached. Speeds up the "check for access" process as context in 
          // which the information resides (a course, a module, a block, the site) is stable. 
-         $this->addField(Zend_Search_Lucene_Field::UnIndexed('context_id', $doc->contextid));
+// (Shirai135): Modify from here
+//       $this->addField(Zend_Search_Lucene_Field::UnIndexed('context_id', $doc->contextid));
+         $this->addField(Zend_Search_Lucene_Field::UnIndexed('context_id', $doc->contextid, $encoding));
+// (Shirai135): Modify to here
          
          //data for document
-         $this->addField(Zend_Search_Lucene_Field::Text('title', $doc->title));
-         $this->addField(Zend_Search_Lucene_Field::Text('author', $doc->author));
-         $this->addField(Zend_Search_Lucene_Field::UnStored('contents', $doc->contents));
-         $this->addField(Zend_Search_Lucene_Field::UnIndexed('url', $doc->url));
-         $this->addField(Zend_Search_Lucene_Field::UnIndexed('date', $doc->date));
+// (Shirai135): Modify from here
+//       $this->addField(Zend_Search_Lucene_Field::Text('title', $doc->title));
+         $this->addField(Zend_Search_Lucene_Field::Text('title', $doc->title, $encoding));
+//       $this->addField(Zend_Search_Lucene_Field::Text('author', $doc->author));
+         $this->addField(Zend_Search_Lucene_Field::Text('author', $doc->author, $encoding));
+//       $this->addField(Zend_Search_Lucene_Field::UnStored('contents', $doc->contents));
+         $this->addField(Zend_Search_Lucene_Field::UnStored('contents', $doc->contents, $encoding));
+//       $this->addField(Zend_Search_Lucene_Field::UnIndexed('url', $doc->url));
+         $this->addField(Zend_Search_Lucene_Field::UnIndexed('url', $doc->url, $encoding));
+//       $this->addField(Zend_Search_Lucene_Field::UnIndexed('date', $doc->date));
+         $this->addField(Zend_Search_Lucene_Field::UnIndexed('date', $doc->date, $encoding));
+// (Shirai135): Modify to here
          
          //additional data added on a per-module basis
          $this->addField(Zend_Search_Lucene_Field::Binary('data', serialize($data)));
@@ -49,7 +71,10 @@
          // for checking access to a module or block content. The Lucene records should only
          // be responsible to bring back to that call sufficient and consistent information
          // in order to perform the check.
-         $this->addField(Zend_Search_Lucene_Field::UnIndexed('path', $path));
+// (Shirai135): Modify from here
+//       $this->addField(Zend_Search_Lucene_Field::UnIndexed('path', $path));
+         $this->addField(Zend_Search_Lucene_Field::UnIndexed('path', $path, $encoding));
+// (Shirai135): Modify to here
          /*
          // adding a capability set required for viewing. -1 if no capability required.
          // the capability required for viewing is depending on the local situation
@@ -66,7 +91,10 @@
          */
          if (!empty($additional_keyset)){
             foreach($additional_keyset as $keyname => $keyvalue){
-                $this->addField(Zend_Search_Lucene_Field::Keyword($keyname, $keyvalue)); 
+// (Shirai135): Modify from here
+//              $this->addField(Zend_Search_Lucene_Field::Keyword($keyname, $keyvalue)); 
+                $this->addField(Zend_Search_Lucene_Field::Keyword($keyname, $keyvalue, $encoding)); 
+// (Shirai135): Modify to here
             }            
          }
     }
diff -Naru search_original/documents/forum_document.php search/documents/forum_document.php
--- search_original/documents/forum_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/forum_document.php	2009-05-30 19:16:47.948778000 +0900
@@ -92,6 +92,13 @@
 
     $coursemodule = get_field('modules', 'id', 'name', 'forum');
     $cm = get_record('course_modules', 'course', $forum->course, 'module', $coursemodule, 'instance', $forum->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this forum: Course=".$forum->course."/ ForumID=".$forum->id);
+        return $documents;
+    }
+// (Shirai136): Add to here
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
 
     foreach($posts as $aPost) {
diff -Naru search_original/documents/label_document.php search/documents/label_document.php
--- search_original/documents/label_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/label_document.php	2009-05-30 19:21:00.325304100 +0900
@@ -87,6 +87,13 @@
 
     $coursemodule = get_field('modules', 'id', 'name', 'label');
     $cm = get_record('course_modules', 'course', $label->course, 'module', $coursemodule, 'instance', $label->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this label: Course=".$label->course."/ LabelID=".$label->id);
+        return $documents;
+    }
+// (Shirai136): Add to here
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
 
     $documents[] = new LabelSearchDocument(get_object_vars($label), $context->id);
diff -Naru search_original/documents/physical_doc.php search/documents/physical_doc.php
--- search_original/documents/physical_doc.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/physical_doc.php	2009-05-30 19:19:01.611090000 +0900
@@ -29,7 +29,11 @@
     // just call pdftotext over stdout and capture the output
     if (!empty($CFG->block_search_word_to_text_cmd)){
         if (!file_exists("{$moodleroot}{$CFG->block_search_word_to_text_cmd}")){
-            mtrace('Error with MSWord to text converter command : exectuable not found.');
+// (Shirai145): Adding path for external converter and modifying "exectuable" -> "executable" (2009/05/30)
+// (Shirai145): Modify from here
+//          mtrace('Error with MSWord to text converter command : exectuable not found.');
+            mtrace('Error with MSWord to text converter command : executable not found at '.$moodleroot.$CFG->block_search_word_to_text_cmd);
+// (Shirai145): Modify to here
         } else {
             if ($directfile == ''){
                 $file = escapeshellarg("{$CFG->dataroot}/{$resource->course}/{$resource->reference}");
diff -Naru search_original/documents/physical_odt.php search/documents/physical_odt.php
--- search_original/documents/physical_odt.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/physical_odt.php	2009-05-30 19:19:45.491556000 +0900
@@ -29,7 +29,11 @@
     // just call pdftotext over stdout and capture the output
     if (!empty($CFG->block_search_odt_to_text_cmd)){
         if (!file_exists("{$moodleroot}{$CFG->block_search_odt_to_text_cmd}")){
-            mtrace('Error with OpenOffice ODT to text converter command : exectuable not found.');
+// (Shirai145): Adding path for external converter and modifying "exectuable" -> "executable" (2009/05/30)
+// (Shirai145): Modify from here
+//          mtrace('Error with OpenOffice ODT to text converter command : exectuable not found.');
+            mtrace('Error with OpenOffice ODT to text converter command : executable not found at '.$moodleroot.$CFG->block_search_word_to_text_cmd);
+// (Shirai145): Modify to here
         } else {
             if ($directfile == ''){
                 $file = escapeshellarg("{$CFG->dataroot}/{$resource->course}/{$resource->reference}");
diff -Naru search_original/documents/physical_ppt.php search/documents/physical_ppt.php
--- search_original/documents/physical_ppt.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/physical_ppt.php	2009-05-30 19:32:14.710235500 +0900
@@ -88,7 +88,11 @@
         $indextext = shorten($text, $CFG->block_search_limit_index_body);
     }
 
-    $indextext = mb_convert_encoding($indextext, 'UTF8', 'auto');
+// (Debug004): 'UTF8' is not right encoding name (2009/05/29)
+// (Debug004): Modify from here
+//  $indextext = mb_convert_encoding($indextext, 'UTF8', 'auto');
+    $indextext = mb_convert_encoding($indextext, 'UTF-8', 'auto');
+// (Debug004): Modify to here
     return $indextext;
 }
 ?>
\ No newline at end of file
diff -Naru search_original/documents/resource_document.php search/documents/resource_document.php
--- search_original/documents/resource_document.php	2009-03-27 18:56:53.477875000 +0900
+++ search/documents/resource_document.php	2009-05-30 19:20:15.664272000 +0900
@@ -99,6 +99,13 @@
         foreach($resources as $aResource){
             $coursemodule = get_field('modules', 'id', 'name', 'resource');
             $cm = get_record('course_modules', 'course', $aResource->course, 'module', $coursemodule, 'instance', $aResource->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+            if (empty($cm)) {
+                mtrace("Missing this resource: Course=".$aResource->course."/ ResourceID=".$aResource->id);
+                return $documents;
+            }
+// (Shirai136): Add to here
             $context = get_context_instance(CONTEXT_MODULE, $cm->id);
             $aResource->id = $cm->id;
             $documents[] = new ResourceSearchDocument(get_object_vars($aResource), $context->id);
diff -Naru search_original/documents/user_document.php search/documents/user_document.php
--- search_original/documents/user_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/user_document.php	2009-05-30 19:26:51.071484200 +0900
@@ -48,7 +48,11 @@
         // module specific information; optional
         
         // construct the parent class
-        parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): User pictures are not displayed in results of blogs (2009/05/29)
+// (Shirai137): Modify from here
+//      parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+        parent::__construct($doc, $data, 0, 0, $user_id, PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): Modify to here
     } 
 }
 
@@ -71,18 +75,30 @@
         $user = get_record('user', 'id', $user_id);
 
         // we cannot call userdate with relevant locale at indexing time.
-        $doc->title         = get_string('post').': '.fullname($user);
+// (Shirai138): Change Title from Author to Posted title when the search result is blog (2009/05/29)
+// (Shirai138): Modify from here
+//      $doc->title         = get_string('post').': '.fullname($user);
+        $doc->title         = $post['subject'];
+// (Shirai138): Modify to here
         $doc->date          = $post['created'];
         
         //remove '(ip.ip.ip.ip)' from chat author list
         $doc->author        = fullname($user);
         $doc->contents      = $post['description'];
-        $doc->url           = user_make_link($user_id, 'post');
+// (Shirai139): Change link address from blog entry to posted blog when the search result is blog (2009/05/29)
+// (Shirai139): Modify from here
+//      $doc->url           = user_make_link($user_id, 'post');
+        $doc->url           = user_make_link($post['id'], 'post');
+// (Shirai139): Modify to here
         
         // module specific information; optional
         
         // construct the parent class
-        parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): User pictures are not displayed in results of blogs (2009/05/29)
+// (Shirai137): Modify from here
+//      parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+        parent::__construct($doc, $data, 0, 0, $user_id, PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): Modify to here
     } 
 }
 
@@ -116,7 +132,11 @@
         // module specific information; optional
         
         // construct the parent class
-        parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): User pictures are not displayed in results of blogs (2009/05/29)
+// (Shirai137): Modify from here
+//      parent::__construct($doc, $data, 0, 0, 0, PATH_FOR_SEARCH_TYPE_USER);
+        parent::__construct($doc, $data, 0, 0, $post['userid'], PATH_FOR_SEARCH_TYPE_USER);
+// (Shirai137): Modify to here
     } 
 }
 
@@ -134,7 +154,11 @@
     if ($itemtype == 'user'){
         return $CFG->wwwroot.'/user/view.php?id='.$itemid;
     } elseif ($itemtype == 'post') {
-        return $CFG->wwwroot.'/blog/index.php?userid='.$itemid;
+// (Shirai139): Change link address from blog entry to posted blog when the search result is blog (2009/05/29)
+// (Shirai139): Modify from here
+//      return $CFG->wwwroot.'/blog/index.php?userid='.$itemid;
+        return $CFG->wwwroot.'/blog/index.php?postid='.$itemid;
+// (Shirai139): Modify to here
     } elseif ($itemtype == 'attachment') {
         $post = get_record('post', 'id', $itemid);
         if (!$CFG->slasharguments){
diff -Naru search_original/documents/wiki_document.php search/documents/wiki_document.php
--- search_original/documents/wiki_document.php	2009-01-08 17:04:10.127375000 +0900
+++ search/documents/wiki_document.php	2009-05-30 19:28:52.328830500 +0900
@@ -168,6 +168,13 @@
     if ($entries){
         $coursemodule = get_field('modules', 'id', 'name', 'wiki');
         $cm = get_record('course_modules', 'course', $wiki->course, 'module', $coursemodule, 'instance', $wiki->id);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+        if (empty($cm)) {
+            mtrace("Missing this wiki: Course=".$wiki->course."/ WikiID=".$wiki->id);
+            return $documents;
+        }
+// (Shirai136): Add to here
         $context = get_context_instance(CONTEXT_MODULE, $cm->id);
         foreach($entries as $entry) {
     
@@ -179,7 +186,11 @@
             if (is_array($pages)) {
                 foreach($pages as $page) {
                     if (strlen($page->content) > 0) {
-                        $documents[] = new WikiSearchDocument(get_object_vars($page), $entry->wikiid, $entry->course, $entry->groupid, $page->userid, $context->id);
+// (Shirai140): The course name is not displayed when the search result is wiki (2009/05/29)
+// (Shirai140): Modify from here
+//                      $documents[] = new WikiSearchDocument(get_object_vars($page), $entry->wikiid, $entry->course, $entry->groupid, $page->userid, $context->id);
+                        $documents[] = new WikiSearchDocument(get_object_vars($page), $entry->wikiid, $wiki->course, $entry->groupid, $page->userid, $context->id);
+// (Shirai140): Modify to here
                     } 
                 } 
             } 
@@ -199,6 +210,13 @@
     $entry = get_record('wiki_entries', 'id', $page->wiki);
     $coursemodule = get_field('modules', 'id', 'name', 'wiki');
     $cm = get_record('course_modules', 'course', $entry->course, 'module', $coursemodule, 'instance', $entry->wikiid);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this wiki: Course=".$entry->course."/ WikiID=".$entry->wikiid);
+        return array();
+    }
+// (Shirai136): Add to here
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
     return new WikiSearchDocument(get_object_vars($page), $entry->wikiid, $entry->course, $entry->groupid, $page->userid, $context->id);
 }
@@ -245,6 +263,13 @@
     $course = get_record('course', 'id', $entry->course);
     $context = get_record('context', 'id', $context_id);
     $cm = get_record('course_modules', 'id', $context->instanceid);
+// (Shirai136): When the course module does not exist in mdl_course_modules, SQL syntax error will occur (2009/05/29)
+// (Shirai136): Add from here
+    if (empty($cm)) {
+        mtrace("Missing this wiki: Course=".$entry->course."/ WikiID=".$context->instanceid);
+        return false;
+    }
+// (Shirai136): Add to here
     // $cm = get_coursemodule_from_instance('wiki', $wiki->id, $wiki->course);
     // $context = get_record('context', 'id', $cm->id);
     if (!$cm->visible and !has_capability('moodle/course:viewhiddenactivities', $context)) {
diff -Naru search_original/query.php search/query.php
--- search_original/query.php	2009-01-08 17:04:10.127375000 +0900
+++ search/query.php	2009-05-30 19:04:03.295889600 +0900
@@ -119,9 +119,16 @@
         } 
         
         // add module restriction
-        $doctypestr = get_string('doctype', 'search');
-        $titlestr = get_string('title', 'search');
-        $authorstr = get_string('author', 'search');
+// (Shirai141): Search option does not work (2009/05/29)
+// (Shirai141): Comment out from here
+//      $doctypestr = get_string('doctype', 'search');
+//      $titlestr = get_string('title', 'search');
+//      $authorstr = get_string('author', 'search');
+// (Shirai141): Add from here
+        $doctypestr = 'doctype';
+        $titlestr   = 'title';
+        $authorstr  = 'author';
+// (Shirai141): Add to here
         if ($adv->module != 'all') {
             $query_string .= " +{$doctypestr}:".$adv->module;
         } 
@@ -342,7 +349,11 @@
                 
                 if ($listing->doctype == 'user'){ // A special handle for users
                     
-                    $icon = print_user_picture ($listing->author, 0, true, 0, true, false) ;
+// (Shirai137): User pictures are not displayed in results of blogs (2009/05/29)
+// (Shirai137): Modify from hre
+//                  $icon = print_user_picture ($listing->author, 0, true, 0, true, false) ;
+                    $icon = print_user_picture ($listing->user_id, 0, true, 0, true, false) ;
+// (Shirai137): Modify to here
                 } else {
                     $iconpath = $CFG->modpixpath.'/'.$listing->doctype.'/icon.gif';
                     $icon = "<img align=\"top\" src=\"".$iconpath."\" class=\"activityicon\" alt=\"\"/>";
diff -Naru search_original/querylib.php search/querylib.php
--- search_original/querylib.php	2009-01-08 17:04:10.127375000 +0900
+++ search/querylib.php	2009-05-30 19:06:19.773034800 +0900
@@ -276,6 +276,10 @@
                     $resultdoc->doctype = $hit->doctype;
                     $resultdoc->author  = $hit->author;
                     $resultdoc->courseid = $hit->course_id;
+// (Shirai143): user_id is not returned (2009/05/29) c.f.(Shirai137)
+// (Shirai143): Add from here
+                    $resultdoc->user_id = $hit->user_id;
+// (Shirai143): Add to here
                     
                     //and store it
                     $resultdocs[] = clone($resultdoc);
@@ -324,7 +328,11 @@
     */
     public function page_numbers() {
       $pages  = $this->total_pages();
-      $query  = htmlentities($this->term);
+// (Shirai142): Search keyword parameter(Multibyte character) is broken at direct link to the pages (2009/05/29)
+// (Shirai142): Modify from here
+//    $query  = htmlentities($this->term);
+      $query  = htmlentities(rawurlencode($this->term));
+// (Shirai142): Modify to here
       $page   = $this->pagenumber;
       $next   = get_string('next', 'search');
       $back   = get_string('back', 'search');
diff -Naru search_original/Zend/Search/Lucene.php search/Zend/Search/Lucene.php
--- search_original/Zend/Search/Lucene.php	2009-01-08 17:04:10.127375000 +0900
+++ search/Zend/Search/Lucene.php	2009-05-30 19:31:16.314470700 +0900
@@ -779,7 +779,11 @@
     public function find($query)
     {
         if (is_string($query)) {
-            $query = Zend_Search_Lucene_Search_QueryParser::parse($query);
+// (Shirai144): When input multibyte characters as search key, iconv library does not work and the search process halt by the error (2009/05/29)
+// (Shirai144): Modify from here
+//          $query = Zend_Search_Lucene_Search_QueryParser::parse($query);
+            $query = Zend_Search_Lucene_Search_QueryParser::parse($query, 'UTF-8');
+// (Shirai144): Modify to here
         }
 
         if (!$query instanceof Zend_Search_Lucene_Search_Query) {