I have one network printer (out of 15 or so) that keeps dropping offline. If I restart the spooler it will come online for about 30-45 seconds, just enough to push the documents in the queue out. None of my other pritners are having an issue.
Server is W2k3, printer is Canon iR3570. Has been working fine for 2 months since moved to server, previous print server had no issues for 4 years.
EDIT: Option to "Use Printer Offline" is not checked.