printing problem

Look if some process hasn't changed attribute of spooler file to read-only. You can find more details in Microsoft Support article (216221):

http://support.microsoft.com/default.aspx?scid=kb;en-us;216221

The main idea is to clear Read-only attribute from spool file if it has one. If not, then I would suggest to make backup and check if file system has no errors on disk that contains spool file.

The one server controls 10 printers?

If yes, and if this is only happening with one of the printers, then I suggest you delete that printers drivers from the server, and then reinstall them. Stop the spooler service and restart. Then see if the problem occurs again. The printer drivers have probably gotten corrupted.

If this is happening with multiple printers on the server, then power off the printers, shutdown the server, power on the printers and then power on the server. You can also try re-applying SP3.

If the problem remains, it would probably help to be able to know which printer (manufacturer/model) you are using and which OS your clients are using. Also it would help to know if the printer only does this with certain users (all on Win9x or WinXP) or if it does it with everyone.

Check under the advanced tab for each printer and make sure that Keep printed documents is not checked. Also make sure that the printer security settings are correct (Admins have everything,Authenticated users have print,creator owner has manage docs).