Ticket #14541: metabox.diff

template.php

@@ -2893 +2893 @@
         if ( !isset($wp_meta_boxes[$page][$context]) )
                 $wp_meta_boxes[$page][$context] = array();
 
-        foreach ( array('high', 'core', 'default', 'low') as $priority )
-                $wp_meta_boxes[$page][$context][$priority][$id] = false;
+        $flag = false;
+        foreach ( array('high', 'core', 'default', 'low') as $priority ) {
+                if ( isset($wp_meta_boxes[$page][$context][$priority][$id]) ) {
+                        $wp_meta_boxes[$page][$context][$priority][$id] = false;
+                        $flag = true;
+                }
+        }
+        
+        return $flag;
 }
 
 /**