Dealing with Oauth 2.0-facebook gem error 100: This authorization code has been used

Question

I have been working on setting up facebook authentication for my rails app and while testing, after logging-in with my facebook account, I keep getting this error:

Answer 1

This bug occurred just after the last facebook push and has been reported to facebook just this morning.

So I guess we just have to wait and, in the meantime, post more details to this report and follow it to both help and solicit facebook folks to solve this issue!