You can get limited functionality back by setting up a new jabber a/c that uses telepathy-haze instead of gabble.

By 'limited' I mean it will connect, messages can be received and replied to, but you won't get any fb chat contacts.

Rather odd because when I first set it up as haze/jabber it worked completely, but by the next day contacts were gone. The same thing is happening in Empathy. Pidgin still appears to work though (pidgin working is what prompted me to try haze).