Okay, I have some feedback on the Intel Mac version of AO.
First of all, cheers for the bug fixes. Shadow Hearts plays very nicely except for some strange noise at the beginning of each song. Interesting thing is that this noise seems to be even processed by the reverb engine

. The only tracks that don't show this are "110 - Army Mood", "213 - Sweet Pillows", "215 - Don't Cry My Vampire" and "231 - Result".
I didn't test much more, yet, but Final Fantasy XII seems to play fine.
Oh, and a few general notes about Audio Overlord itself:
I don't know how many people have already asked for this, but Audio Overload is not actually the best player in terms of usability. Some simple playlist functions like "Clear Playlist" or "Song Shuffle" in unison with automatic advancing after a track is finished would be nice additions to make AO the greatest game music player in the world.
Another feature I'd like to see in the Mac version would be hiding the player window when pressing the Close button instead of closing AO completely.