Is fb:submit gone?

I have an old FBML app that uses fb:submit. When I was try开发者_StackOverflow中文版ing to make a few changes to it I noticed that the fb:submit buttons aren't functioning and I'm not sure whats happened here.

FBML is deprecated, but anything which was already working should still be - if you're sure that this is not a problem on your end there may be a bug with the FBML - if so, please file it at http://bugs.developers.facebook.net

You should absolutely be migrating away from FBML. Facebook has expressed interest in removing it entirely from the Platform by the end of the year.

Opening a bug will likely not be addressed or fixed due to the deprecation of FBML.