All of a sudden my printer won't print. I'm running 10.2 and am printing over an Airport network (but the problem is occuring on the Mac that the printer is plugged into, as well). When I try to print something, the Print Center pops up but never goes away. When I select my printer from the list, it says "Waiting for job to complete" with the little barbershop waiting thing. All of the choices for cancelling jobs are grayed out. It's an HP 920C. I printed on job with no problems this morning, then this started happening on the next. I've restarted all devices involved, checked the printer for physical problems... nada. Any ideas? I'm desperate!