That plugin completely messes up the display of the registration page. I mean text and stuff goes everywhere.
Not sure if this helps, but I have an age-restricted forum that requests DOB info first before going to the main registration page. (vb 4.1.4 btw)
I couldn't possibly give you facebook info ... far too personal, sorry.
No worries though, it's still far better than the original vb version so I'm not gonna sweat about it