Index: trunk/core/kernel/application.php
===================================================================
diff -u -r2676 -r2678
--- trunk/core/kernel/application.php	(.../application.php)	(revision 2676)
+++ trunk/core/kernel/application.php	(.../application.php)	(revision 2678)
@@ -1044,7 +1044,7 @@
 	 */
 	function isDebugMode()
 	{
-		return defined('DEBUG_MODE') && DEBUG_MODE;
+		return defined('DEBUG_MODE') && DEBUG_MODE && is_object($this->Debugger);
 	}
 
 	/**