I have gaim 0.62 and keys > 1024 are not working.
I receive the keys(they are in known_keys file) but "message garbled" appears instead of the message.
Hmm. A 2048 bit key is working fine for me with AIM, so I'm not sure what is causing a problem for you. What messaging protocol are you using?
I didn't test another protocol.
I've gotten another bug report about long keys with Yahoo messenger as well. I'll go ahead and sign myself up with Yahoo and see if I can diagnose what's going on. I think it's probably a maximum message length restriction by Yahoo, which might really complicate things for the plugin.