I'm printing documents and images to a Samsung ML1630. It used to work fine, but now it prints white instead of black, black instead of white. Text documents come out white text on solid black background. Of course, it used to work fine. Before declaring the printer itself guilty, is it possible that something in my Linux setup, the kernel or printer driver or some hidden setting somewhere is causing this trouble?
Since this problem appeared about a month ago, I've updated everything with the package manager, rebooted a couple times, and the problem persists. Can't blame it on a cosmic ray!