I've got the correct driver selected (4320-4350 UFRII US). I've installed it about 10 times now, repaired permissions, reset printer system, deleted UFR 2 prefs, etc. What happens is when you print, the print dialog times out trying to load the driver, eventually resulting in an mcc.app unexpectedly quit message. I can then print, but I get a further error (10322 or something like that, stating UFR2 cannot communicate with the printer). The scanner driver isn't even working - Image Capture and Preview can't find the scanner. I had no such problem with my old LIDE90 scanner.
Two computers are giving me this problem (iMac and Mac Mini). What kind of driver or extension would interfere like this?