diff -rbu cas-DRUPAL-6--1/cas.module cas-DRUPAL-6--1-patched/cas.module
--- cas-DRUPAL-6--1/cas.module  2008-03-05 04:22:53.000000000 +0100
+++ cas-DRUPAL-6--1-patched/cas.module  2009-06-04 11:09:21.000000000 +0200
@@ -643,7 +643,7 @@
 function _cas_force_login()
 {
 
-  list($arg0) = split('/',$_GET['q']);
+  list($arg0) = explode('/',$_GET['q']);
   // Don't even do the test if we're hitting the cas page
   if ($arg0=="cas")
   {