I've had some weird issues with printing to the network printer at work. I am able to print simple text documents from apps like TextEdit, but when printing pages from apps like NeoOffice, Thunderbird, and Firefox, the print job fails. I have it setup using IPP (Internet Printing Protocol), and have supplied the IP address of the printer. Now, this printer is within a directory that requires windows users to authenticate to setup the printer. I would normally think this was the problem, but the fact that I'm able to print from some apps and not others makes everything a bit more confusing. Has anyone else had any luck printing to a network printer from their Mac?