WordPress MU

I am the developer of several MU plugins, since the upgrade to WPMU 2.7 the menu system on all my plugins doesn’t work.

To be more specific my plugins all have a top level menu with several sub menus. The top level menu works however none of the sub menus work.

In addition I tried the basic top level menu example in the Wordpress documents (http://codex.wordpress.org/Adding_Administration_Menus#Inserting_the_Pages) and get the same error.

In WP 2.6 you could have a mu-plugin with a menu URL like (/wp-admin/help-desk.php?page=help-desk.php) however this doesn’t work in WP 2.7.

If I change the URL to use like admin.php like this (/wp-admin/admin.php?page=help-desk.php) everything works fine.

Is this some new way of creating menus in 2.7 or is there a bug in the WPMU menu system?

I believe there's a slightly different process with admin menus in 2.7.

I think there is a small bug in the menu code in menu-header.php

See this post for the fix http://ozblog.com.au/2009/02/23/wordpress-mu-27-sub-menu-problem/