Canon MX410 printer not cooperating

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http://forums.fedoraforum.org – I have a Canon MX410 All-In-One printer that's worked OK up 'til now for my minimal printing needs. Suddenly, it's stopped printing. Ink and paper are fine, the Nozzle Test shows no problems and it both copies and scans correctly. It accepts print jobs and CUPS claims that they've printed but nothing happens. Canon "support" gave up at that point because they don't supply the drivers and won't try to support any software they didn't write. I removed the printer completely and re-added it. The test page printed, but nothing else. After considerable playing around I got it to (HowTos)