Index: imagecache.module
===================================================================
--- imagecache.module	(revision 722)
+++ imagecache.module	(working copy)
@@ -214,7 +214,7 @@
  */
 function imagecache_create_url($presetname, $filepath, $bypass_browser_cache = FALSE) {
   $path = _imagecache_strip_file_directory($filepath);
-  $query = $bypass_browser_cache ? time() : $bypass_browser_cache;
+  $query = $bypass_browser_cache ? time() : NULL;
   switch (variable_get('file_downloads', FILE_DOWNLOADS_PUBLIC)) {
     case FILE_DOWNLOADS_PUBLIC:
       return url($GLOBALS['base_url'] . '/' . file_directory_path() .'/imagecache/'. $presetname .'/'. $path, $query, NULL, TRUE);