I've just applied XP SP2 and now find that I cannot burn some discs. I've never had any problems before. The discs in question are Traxdata Ritek G04's and I'm getting the old Nero Power Calibration Error. I've burned many of these (and other G04's) before. The weird thing is that I CAN burn a crappy old Memorex that I found lying around. I'd like to get this working again without uninstalling SP2 (if possible). What could have happened ? Environment is XP Pro SP2, Nero 6 (all latest levels), NEC ND-1300A burner.