Comment 48 for bug 486643

encountered this error on random again. i can not give any more detail when this error occurs but i did find a fix for the problem which works at the moment. i am going to post the fix and reopend the bug.

found at: http://forums.linux-foundation.org/read.php?19,5970
Solution from [gentoo-wiki.com(http://gentoo-wiki.com/Cups)]: in the CUPS web interface, ignore the fact that the printer appears nowhere, and manually enter the device URI "parallel:/dev/usb/lp0".