User blog comment:Shahid/Facebook Connect/@comment-152910-20100706181051

@Fandyllic we've tested a couple of times from this end, and we can't seem to replicate the error you mentioned. Here's what we did:

Start: user is logged out of Facebook and Wikia.
 * Log into Wikia with a non-facebook connected account
 * Head to Special:Connect
 * The page contains an invitation to connect
 * Click the Connect button
 * Popup for Facebook login
 * Click accept on all permission dialogs

... and this connects the account to Facebook OK.

You will see the verification error if you click "don't allow" on any of the Facebook permission dialogs. Can you verify whether you did this during your test?