Index: trunk/core/kernel/application.php
===================================================================
diff -u -r4971 -r5002
--- trunk/core/kernel/application.php	(.../application.php)	(revision 4971)
+++ trunk/core/kernel/application.php	(.../application.php)	(revision 5002)
@@ -612,6 +612,11 @@
 				$this->LinkVar('return_template');	// template to go, when something was coosen from popup (from finalizePopup)
 				$this->LinkVar('return_m');			// main env part to restore after popup will be closed (from finalizePopup)
 			}
+			
+			if ($this->GetVar('ajax') == 'yes') {
+				// hide debug output from ajax requests automatically
+				define('DBG_SKIP_REPORTING', 1);
+			}
 		}
 
 		if (!$this->RequestProcessed) $this->ProcessRequest();