We have a custom facebook login which I wrote for our website sourcecodedb.com and without any changes to our code the facebook login stopped working around april 15th 2012, our
Fixed it by changing
CURLOPT_CONNECTTIMEOUT => 10
To
CURLOPT_CONNECTTIMEOUT => 60
in base_facebook.php
I had the same problem, and resolved it by:
src
Now it works for me again. Cheers.