Index: UI/Common/UIxAclEditor.m
--- UI/Common/UIxAclEditor.m.orig
+++ UI/Common/UIxAclEditor.m
@@ -167,7 +167,7 @@
       if (!defaultUserDisable && defaultUserID)
       {
 
-          userData = [NSDictionary dictionaryWithObjectsAndKeys:
+          userData = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                      defaultUserID, @"uid",
                                    [self labelForKey: @"Any Authenticated User"], @"cn",
                                    @"public-user", @"userClass",
@@ -178,7 +178,7 @@
       if ([self canSubscribeUsers] && [self isPublicAccessEnabled])
         {
           // Add the 'public access' user
-          userData = [NSDictionary dictionaryWithObjectsAndKeys:
+          userData = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                      @"anonymous", @"uid",
                                    [self labelForKey: @"Public Access"], @"cn",
                                    @"public-user", @"userClass",
