I am experiencing the same error (confirmed with Wireshark) in Empathy after updating from libpurple-2.6.4-2.fc12.i686 to 2.6.5-1.fc12.i686.
I undid a batch of updates applied at 2010-01-13 12:54, which brought me back to libpurple-2.6.3-2.fc12.i686. After rebooting, I was able to connect to the AIM network in Empathy. Then I updated Empathy only, to 2.6.5-1.fc12.i686, and I started getting the same error again.
libpurple is part of the pidgin component, but I don't know whether the problem is in Empathy or libpurple code.
I am experiencing the same error (confirmed with Wireshark) in Empathy after updating from libpurple- 2.6.4-2. fc12.i686 to 2.6.5-1.fc12.i686.
I undid a batch of updates applied at 2010-01-13 12:54, which brought me back to libpurple- 2.6.3-2. fc12.i686. After rebooting, I was able to connect to the AIM network in Empathy. Then I updated Empathy only, to 2.6.5-1.fc12.i686, and I started getting the same error again.
libpurple is part of the pidgin component, but I don't know whether the problem is in Empathy or libpurple code.