[wp-testers] Strange Mu behaviour

[Matthew Robinson]

I have a plugin (Subscribe2 http://subscribe2.wordpress.com) that  
inserts 4 admin panel menus.

I've managed to get the code working as expected on 2.1.x and  
WordPress Mu but..

I have a user of WordPress Mu who is getting some weird behaviour.  
There are 2 Mu blogs on the site, 1 works totally as expected, the  
other (with the same setup and same plugins installed) redirects 2 of  
the Subscribe2 admin panels to the wrong function within the code and  
therefore displays the wrong page!

The add_page code is correct in my plugin (checked visually and  
confirmed by the test blog). What could be wrong on the main site  
such that we are seeing this output?

Confused,

Matt R