[FreeNX-kNX] Zombie hunting

[listen at stephan.homeunix.net]

Hello,

I ran some diagnostics about the previosly reported login issues and found
a disturbingly huge number of "running" sessions. None of them is in use
so far, thus I decided to run nxserver --cleanup.
By doing so, I got some strange error-messages like:

NX> 716 Terminating session D70D3F74608DCD6B290B2E1F1FE5AFED on user request.
rm: cannot remove
`/home/shelali/.nx/C-epsilon.local-1020-D70D3F74608DCD6B290B2E1F1FE5AFED//.nfs005b48e90000010a':
Device or resource busy
NX> 1001 Bye.
NX> 1000 NXNODE - Version 1.4.0-44 OS (GPL)
NX> 716 Terminating session D78B067FBA123971A051FA77A840B744 on user request.
rm: cannot remove `/tmp/.X1013-lock': Operation not permitted
rm: cannot remove `/tmp/.X11-unix/X1013': Operation not permitted
NX> 1001 Bye.

appearing multiple times.
Might this messages be connected to my login problems somehow? What
exactly do they mean?
Is there a way to get rid of all sessions, that are unused for about 60
minutes are to disable the suspend / resume feature?

Thanks in advance
Keep smiling
yanosz