Only 10 hours ago, if I call $facebook->getUser(), I can get the correct user_id, but now, it always returns 0. Of cource, I have not changed my code.
There is another strange point.
redirect_url contains:
?sate=9b1772342342...&code=9b177asd2l..&base_domain=9b1772.3423#=
I can't release the site.. Please help!