I am hooked up to a LAN here at work and there are 2 printers, an HP laserjet and a big XEROX Docutech.
The problem is I keep losing the ability to print to the Xerox. Everything was fine, then suddenly the Xerox icon (I use desktop printing) became a generic printer icon and when I went to switch to it in the chooser I would get a "Printer not available" warning and nothing else. I couldn't figure this out so after a couple of re-starts and a desktop rebuild I re-installed the printer software and everything was back to normal.
Now suddenly, I have another generic icon and an "Adobe Printer Library unable to load" warning. I can't link this to any specfic event, I went to lunch and when I came back the Xerox was gone again.
Nothing untoward has happened at the Xerox itself, ppl have been using it all day.