I've had this issue once before, but just reinstalled craxtion and made another coaster before I remembered to change the setting...
If I leave craxtion set to ximage to create an iso, it appears to work fine, and when I burn the image in record now max it gets nearly all the way to the end before terminating the burn 'with errors'. Seems to happen every time. I can't recall for certain whether this affects single game discs, but I have definitely never gotten an mxm multi game disc to work when using craxtion/ximage to create the iso.
Switching to GDF image cures the problem.
What could be wrong here?