If I rip + encode one CD, and then move on to the next CD while the last one is still finishing it's encoding, I can't rip the new one. Grip thinks that it is ripping the CD, but it is not. The drive never spins up, although the status messages say that grip is perfectly happy (ie. no errors are reported). This is also after editing the track names on the new CD. I don't know if that is relevant. This did work perfectly in previous versions of grip.
FTR, if I shut down grip, eject and CD and put it back in, and fire up grip again, I can then rip + encode that CD. I must wash, rinse, repeat for the next CD, and so on.
grip is no longer shipped in the development tree; as such, it is unlikely older bugs will be fixed.