There’s a fix for those of you experiencing extremely slow framerates in 2.50. Simply disable “Auto Login” in Settings>Personnel Jacket. Quit, then restart the game. When you join a server, your settings will be reloaded automatically anyways. (Save login info should remain checked). My framerate went from sub 10 to over 50 on an iMac G5/FX5200. For more information see this thread at official AA forums.