Same problem for me.
In fact, this might appear on some CD's exclusively.I tried many times to rip+encode the same ones with the same results : buffer overflow.
I tried to find a solution and saw in Launchpad some peopl telling the problem comes from ID3tags : https://bugs.launchpad.net/ubuntu/+source/grip/+bug/283658
They also says grip is no more maintained.
2009-09-28 18:11:43 UTC in Grip
