The error occurs when you try to create a new site from ../wp-admin/ms-sites.php .
The blog appears to be created, but the new user create is a local user and the blog that is created doesn't work (empty tables with no roles, metadata, or user).
If the user is added to the system first, then a blogs are correctly created. I imagine it is just a change in one of the functions but my php skills are weak and I can't figure it out. :(
Thanks for any help you might be able to offer, you've made blogging possible for a ton of K-12 students in my school district.
Andy :)
Thanks for the feedback - this is an issue I've been working on resolving.
Currently i'm waiting for the outcome of this ticket http://core.trac.wordpress.org/ticket/14621
Thanks. We've just removed the extra button for now.
It is a great plugin!
Andy