It seems that something called klusmgr (KLIBC User management) *must* be installed and run to setup users/groups.
Apparently, that isn't true. The Samba server Users and Groups thing will do the job.
I am informed that ArcaOS handles this as does the latest version of klibc - probably why Doug was not having this problem.
No, that has nothing to do with ArcaOS, although it will appear when you do the ANPM (RPM/YUM) update that includes it. I never saw it, before a few days ago, and it was not part of ArcaOS, until it got installed by ANPM. Certainly not required for the CUPS that ArcaOS installs.
So far, there are no real docs for it, so I really don't know what it is all about. Ask Bitwiseworks, it is something that they did.
The gstoraster problem has also been reported so will post update when/if resolved.
Somehow, this would seem to be that you need the "which" package installed (mentioned earlier, I think). Without it, CUPS cannot find the programs that are needed. However, that won't stop CUPSD.EXE from running, unless there is something different in what ArcaOS did.
Can you prove your claim that almost rpm package is broken? Everything I have installed here (>100) seems to work fine.
I will agree with that statement, up to a point. There are a few packages that do have problems. I have never tried to figure out which ones, and they usually get fixed shortly after the problems get reported. I suspect that most problems are harmless. I will also state that RPM/YUM was a bad choice to manage these things, but that is what it is. If you don't like it, either do something about it, or, stop using it.
How well this KLIBC user management integrates with UPM?
Let us know, when you figure it out. It doesn't mention UPM (whatever that is), so it probably doesn't have anything to do with it. From what I see, it is basically the same program that handles the Samba server Users and Groups stuff.