Index: branches/unlabeled/unlabeled-1.1.2/core/admin_templates/js/ajax.js
===================================================================
diff -u -r6899 -r6903
--- branches/unlabeled/unlabeled-1.1.2/core/admin_templates/js/ajax.js	(.../ajax.js)	(revision 6899)
+++ branches/unlabeled/unlabeled-1.1.2/core/admin_templates/js/ajax.js	(.../ajax.js)	(revision 6903)
@@ -291,6 +291,11 @@
 	switch ($params[0]) {
 		case 'GetSize':
 			// store responce to cache for future use
+			if (!$responce.match(/([\d]+)x([\d]+)/)) {
+				// invalid responce was received, may be php fatal error during AJAX request
+				$responce = '750x400';
+			}
+			
 			$object.PopupSizes[ $params[1] ] = $responce;
 			break;
 	}