I had trouble ripping some CDs; I have had a bit more luck since, but not 100%.

I'm using Xing's AudioCatalyst, which refused to either rip complete CD's, or specific tracks. I am using ASPI RIP from a Plextor 32TSi under NT 4.

One CD had a multi-session setup which contained a multimedia track; I have been unable to rip the last audio track on this disk no matter what I try. On the disks I had single track trouble with, I carefully cleaned the disks (radially) and I could then RIP without trouble. For the disk I had which was spat out in it's entirety - well, I have had trouble playing it on a couple of Audio players, so I suspect it's a duffer.

So my "generic" remedy is clean the disks, carefully.