Client still trying to use obsolete Software Update server

Question

I was experimenting with Mac OS X Server, including the Software Update Server and setting up managed client computers. After some testing, I decided that Mac OS X Server was too complex for our needs and switched the server back to standard Mac OS X. I also removed the server from the Directory Access settings on my client machine, and rebooted.
I thought this was enough to clean up my client machine, but it is still trying to access the Software Update Server on my test server. I can tell this by running softwareupdate from the command line:
dalba ~> softwareupdate --list
Software Update Tool
Copyright 2002-2005 Apple
2007-03-07 09:29:24.219 softwareupdate[353] Loading CatalogURL http://purr.local:8080/index.sucatalog
2007-03-07 09:29:28.804 softwareupdate[353] loader:didFailWithError:NSError "can’t find host" Domain=NSURLErrorDomain Code=-1003 UserInfo={
NSErrorFailingURLKey = http://purr.local:8080/index.sucatalog;
NSErrorFailingURLStringKey = "http://purr.local:8080/index.sucatalog";
NSLocalizedDescription = "can\U2019t find host";
can’t find host
I can't figure out where this setting is being stored so that I can erase it. I've already tried using the Restore Default feature of Software Update Enabler <http://www.wiretapped.net/~proton/suenabler/>, but that hasn't fixed the problem, even after resetting all three preference domains (Current User on This Computer, Current User on Any Computer, and All Users on This Computer) and restarting. I've searched through /Library/Preferences for the string "purr.local" and didn't get any hits.
Any clues as to where this setting is being stored, or how to erase it?
--Stuart
PowerBook G4 17"   Mac OS X (10.4.8)  

Answer 1

I think I just solved my own problem.
There are settings in /Library/Managed Preferences that aren't reset by Software Update Enabler. In particular, I had a file named "/Library/Managed Preferences/samalone/com.apple.SoftwareUpdate.plist" that contained the obsolete server setting for Software Update. In my case, I don't want to have managed preferences anymore, so I just deleted the entire /Library/Managed Preferences folder and restarted.
--Stuart