--- a/gosa-core/include/class_management.inc
+++ b/gosa-core/include/class_management.inc
@@ -131,7 +131,15 @@
     $this->registerAction("cancelFilter","cancelFilter");
 
     // To temporay disable the filter caching UNcomment this line.
-    #session::global_un_set(get_class($this)."_filter");
+
+    /*
+     * As a work-around for flawed object storage in the PHP $_SESSION array
+     * the filter caching has been deactivated since gosa 2.7.4+reloaded3-8.
+     * 
+     * See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=907815#31 for
+     * details.
+     */
+    session::global_un_set(get_class($this)."_filter");
   }
 
   
