--- collapse_text.orig	2008-12-19 23:39:32.000000000 +0300
+++ collapse_text.module	2008-12-19 23:36:37.000000000 +0300
@@ -123,5 +123,6 @@ function _collapse_text_replace_callback
  * Per #256354 and #231529. Thanks rolf, sza, jippie1948, Justyn
  */
 function collapse_text_init() {
-  drupal_add_js('misc/collapse.js', 'core');
+  if (function_exists('drupal_set_content'))
+  	drupal_add_js('misc/collapse.js', 'core');
 }