Hi, as a super admin, I can upload a file just fine. But, as a different usergroup, I get to step 2 of the file upload, and there is a blank page. I made certain that said usergroup has the ability to upload files. But, cannot figure out why this step wouold return a blank page for a different usergroup. Can you help?

Solved.

Superadmins are exempt from a lot of checking, this sounds like it may be triggering the XSS sanitizing, since you can upload it as a superadmin but not as a member. You can disable that, if you wish, here:

Admin › System Preferences › Security and Session Preferences

http://expressionengine.com/forums/viewthread/60279/