I have a Plextor 40X SCSI also and am experiencing the exact same problem but under Linux, so I doubt it's a driver issue. On long CD's (> 60mins) it has trouble riping the last few tracks. Out of the 250 or so CD's I have, I only experienced this on 3 or 4 CD's. The drive rips beautifully otherwise. Kind of annoying since I purposely bought this drive because I believed it was the highest quality drive for ripping available.