(The same issue affects the multilang filter itself).

This seemed to make it work:

Index: multilangupgrade.php
===================================================================
RCS file: /cvsroot/moodle/moodle/admin/multilangupgrade.php,v
retrieving revision 1.4
diff -c -r1.4 multilangupgrade.php

• • • multilangupgrade.php 15 Jun 2007 06:08:51 -0000 1.4
    • multilangupgrade.php 18 Jun 2007 08:41:03 -0000
      ***************
    • 59,65 ****
      if ($rs and $rs->RecordCount() > 0) {
      while (!$rs->EOF) {
      $text = $rs->fields[$column];
      ! $search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]".?>.?<\/(?:lang|span)>)(\s*<(?:lang|span) lang="[a-zA-Z0-9_-]".?>.?<\/(?:lang|span)>)+/is';
      $newtext = preg_replace_callback($search, 'multilangupgrade_impl', $text);
      if ($newtext != $text) {
      $newtext = addslashes($newtext);
    • 59,65 ----
      if ($rs and $rs->RecordCount() > 0) {
      while (!$rs->EOF) {
      $text = $rs->fields[$column];
      ! $search = '/(<(?:lang|span) lang="[a-zA-Z0-9_-]".?>.+?<\/(?:lang|span)>)/is';
      $newtext = preg_replace_callback($search, 'multilangupgrade_impl', $text);
      if ($newtext != $text) {
      $newtext = addslashes($newtext);