It looks as if Grip cannot work with SATA drives. After swapping my IDE drive for a SATA drive I cannot use Grip any more, though I changed /dev/hdc into /dev/scd0 and even tried /dev/sg0 as a generic device. I can use cdparanoia on the command line to ripp a CD and also any other program can use the new SATA drive: k9copy, kcd, kaudiocreator, ripperX, sound-juicer, xine, mplayer, you name it. Grip it the only programm that can not use the SATA drive.
The symptoms look like this: after opening the drive and inserting a CD, I can use the appropriate button in Grip's to close the cd-tray. The CD speeds up and after a few seconds the title and tracks of the cd are shown, but after 3 seconds this information vanishes again and Grip tells me that there is no CD in the drive.