Index: form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.112.2.14
diff -u -r1.112.2.14 form.inc
--- form.inc	4 Jul 2006 09:23:19 -0000	1.112.2.14
+++ form.inc	18 Jul 2006 10:01:31 -0000
@@ -1017,7 +1017,9 @@
   if ($element['#autocomplete_path']) {
     drupal_add_js('misc/autocomplete.js');
     $class[] = 'form-autocomplete';
-    $extra =  '<input class="autocomplete" type="hidden" id="'. $element['#id'] .'-autocomplete" value="'. check_url(url($element['#autocomplete_path'], NULL, NULL, TRUE)) .'" disabled="disabled" />';
+    # Autocomplete doesn't play nice with slashes in the search string unless I 
+    # use the ?q= syntax . Apache seems to get confused. 
+    $extra =  '<input class="autocomplete" type="hidden" id="'. $element['#id'] .'-autocomplete" value="'. check_url(url('','q='.$element['#autocomplete_path'], NULL, TRUE)) .'" disabled="disabled" />';
   }
   _form_set_class($element, $class);
   $output = '<input type="text" maxlength="'. $element['#maxlength'] .'" name="'. $element['#name'] .'" id="'. $element['#id'] .'" '. $size .' value="'. check_plain($element['#value']) .'"'. drupal_attributes($element['#attributes']) .' />';