The following issue has been reported by one of the NX users. Whilst checking the log files of the server the user saw several thousands of lines of errors, even though the server connection had not failed and was being used without problems.

Feb 3 22:36:47 SuSE92 [powersave][4103]: ERROR in Function
handleSocketRequest; line 353: User is not allowed to connect to daemon.
Feb 3 22:36:48 SuSE92 [powersave][4103]: resmgr: server response code
200 Feb 3 22:36:48 SuSE92 [powersave][4103]: ERROR in Function
handleSocketRequest; line 353: User is not allowed to connect to daemon.
Feb 3 22:36:49 SuSE92 [powersave][4103]: resmgr: server response code 200

Making the NX user a member of the PowerSave group on the server the messages will go away. Another solution is to take the powersave daemon out of the rc5.d and the same result will be achieved.