Hmm interesting, as the previous version compared to this one does not have lots of GUI stuff differences.
I’ll try to setup a network over here on a clean install and see what happens. If your pages are completely blank ( so white page ) I would really appreciate an error log file.
The pages are not blank the WP UI look and feel are there, its just missing any options. The left menu only has options for Dashboard(which only contained wp news and wp blog) and Profile, thats it! Could no longer get to anything else within the WP UI. After uninstall all returned to normal.
Are you running PHP4 or PHP5 ?
I am currently looking into this. Looks as if this has something to do with the submenu creation by my plugin.
Update: the problem lies in the is_admin() function.
Stand by for the new version.