--- ../../moodle-1.7/lib/blocklib.php   2006-10-26 14:55:24.000000000 +0100
+++ blocklib.php        2006-12-04 20:34:07.000000000 +0000
@@ -907,26 +907,29 @@
     // Here we slyly count $posblocks and NOT $positions. This can actually make a difference
     // if the textual representation has undefined slots in the end. So we only work with as many
     // positions were retrieved, not with all the page says it has available.
+    $pageformat = $page->get_format_name();
     $numpositions = count($posblocks);
     for($i = 0; $i < $numpositions; ++$i) {
         $position = $positions[$i];
         $blocknames = explode(',', $posblocks[$i]);
         $weight = 0;
         foreach($blocknames as $blockname) {
-            $newinstance = new stdClass;
-            $newinstance->blockid    = $idforname[$blockname];
-            $newinstance->pageid     = $page->get_id();
-            $newinstance->pagetype   = $page->get_type();
-            $newinstance->position   = $position;
-            $newinstance->weight     = $weight;
-            $newinstance->visible    = 1;
-            $newinstance->configdata = '';
-
-            if(!empty($newinstance->blockid)) {
-                // Only add block if it was recognized
-                insert_record('block_instance', $newinstance);
-                ++$weight;
-            }
+         if( blocks_name_allowed_in_format($blockname, $pageformat) ){
+             $newinstance = new stdClass;
+             $newinstance->blockid    = $idforname[$blockname];
+             $newinstance->pageid     = $page->get_id();
+             $newinstance->pagetype   = $page->get_type();
+             $newinstance->position   = $position;
+             $newinstance->weight     = $weight;
+             $newinstance->visible    = 1;
+             $newinstance->configdata = '';
+
+             if(!empty($newinstance->blockid)) {
+                 // Only add block if it was recognized
+                 insert_record('block_instance', $newinstance);
+                 ++$weight;
+             }
+         }
         }
     }