Network print problem

Since about two days, Vista computers on my home network are slow as
molasses trying to print anything over the network. I have several times
had "Spooler App" quit mysteriously too. I have run System Restore back to
four days ago, when there was no problem. I have removed all updates back
to then too. Nothing seems to help. Frustratingly, XP computers print
fine. The print server has been XP up until this happened, but now that
configuration is unworkable. Vista client with Vista server doesn't work
either. XP client to Vista server works fine.

Any ideas? Anyone else seeing this?

Thanks.

Earle