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;
 	}
Index: branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js
===================================================================
diff -u -r6899 -r6903
--- branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js	(.../script.js)	(revision 6899)
+++ branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js	(.../script.js)	(revision 6903)
@@ -1154,11 +1154,18 @@
 
 	function getFrame($name)
 	{
-		var $frameset = window.parent.frames;
+		var $main_window = window;
+		
+		while ($main_window.opener) {
+			// cycle through popups to get main window
+			$main_window = $main_window.opener;
+		}
+		
+		var $frameset = $main_window.parent.frames;
 		for ($i = 0; $i < $frameset.length; $i++) {
 			if ($frameset[$i].name == $name) {
 	    		return $frameset[$i];
 	    	}
 		}
-		return window.parent;
+		return $main_window.parent;
 	}
\ No newline at end of file