I recently had a sudden "ain't going to print" problem (although not on a network), and I got around it by dropping into root and going to "lpc". Then I issued the "abort" command, followed by "start all". When I exited lpc, everything was back to normal.
YMMV, though. I don't know why it happend (and yes, it "fixed itself" as mysteriously as it began...) - Nick [EMAIL PROTECTED]