Does Q&A work with Facebook ultimate?

This is one of your best plugins, with a lit bit of turns and customization it can actually become so powerful , the thing is the user has to be connected to leave anything , I wonder if we could use your comment plus connection system with combination with QA which will make this perfect.

By the way , does it work with facebook Ultimate? I have activated Your facebook plugin and I'm getting this error contantly
"API Error Code: 191
API Error Description: The specified URL is not owned by the application
Error Message: redirect_uri is not owned by the application."

, Well I am sure that I have forgotten something in Url verification but I do not know what it is.

The best Idea would be to be able to use comment plus social connection for login plugin,

By the way , I'm using W3 total cache on a MU with sub-directories