Index: UI/Common/UIxFolderActions.m
--- UI/Common/UIxFolderActions.m.orig
+++ UI/Common/UIxFolderActions.m
@@ -108,7 +108,7 @@
           objectCreator = ([owner isEqualToString: login] || [allACLs containsObject: SOGoRole_ObjectCreator]);
           objectEditor = ([owner isEqualToString: login] || [allACLs containsObject: SOGoRole_ObjectEditor]);
           objectEraser = ([owner isEqualToString: login] || [allACLs containsObject: SOGoRole_ObjectEraser]);
-          acls = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool: objectCreator], @"objectCreator",
+          acls = [NSMutableDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithBool: objectCreator], @"objectCreator",
                                    [NSNumber numberWithBool: objectEditor], @"objectEditor",
                                    [NSNumber numberWithBool: objectEraser], @"objectEraser", nil];
 
