Index: branches/RC/core/kernel/utility/event.php
===================================================================
diff -u -r8929 -r10336
--- branches/RC/core/kernel/utility/event.php	(.../event.php)	(revision 8929)
+++ branches/RC/core/kernel/utility/event.php	(.../event.php)	(revision 10336)
@@ -292,6 +292,10 @@
 
 			// 1. get section by current top_prefix
 			$top_prefix = $this->getEventParam('top_prefix');
+			if ($top_prefix == false) {
+				$top_prefix = $this->Application->GetTopmostPrefix($this->Prefix, true);
+				$this->setEventParam('top_prefix', $top_prefix);
+			}
 			$section = $this->Application->getUnitOption($top_prefix.'.main', 'PermSection');
 
 			// 2. check if this section has perm_prefix mapping to other prefix