Just curious what version you using, they've released several versions this year. Another thing you might try is checking the firmware of your drive. My Pacific Digital had an update that fixed some trouble with newer media--Those Pioneer blanks may be high quality, but don't mean squat if your drive can't write them properly. And don't tell me they do other discs fine--mine did too, until I got some real tricky sources to rip. A new firmware may also fix DAO compatability as well, or at least give you TAO as an option to try.
http://www.firmware.fr.st/
Best rule of thumb--make sure EVERYTHING is patched and updated--including your OS and firmwares. I've even seen freaky DirectX bugs mess with audio ripping before. You never know....
Good Luck