Which Ubuntu release are you running this on? Seveas hasn't released updated FreeNX packages for 6.10 yet (not knowing the reason why, I can't speculate if any will be released at all) so I've been sticking with 6.06 for the time being. Are you using FreeNX on a 6.10 system? I have installed it on 6.10, I take chances as I am lucky to have a test machine.