Well maybe, this Thread is old now but...
Well, I exactly have the Battle Bug.
If I fight with normal attacks, everything runs fine,
but when I use magics or Skills the game freezes sometimes..
Can anyone please, please help me?
I really HAD TO get this game, cuz' I'm german, and this game isn't supported for German PS2's =(
Somehow I fixed it.
I removed the Crosses in all Flush to Zero and all denormals are zero.
The game lagged and only had 80% normal speed in fights with 3 enemies, but I was able to spam Skills and Magics like I wanted, without shutting down.
The better way is only removing both all Flush to Zero's.
This way I got almost all the time 99% of the normal speed, also in boss battles!
And no Freeze in battles
I left my post, so that people who have the same problem, can solve it.