After a closer look to poseden's maxi images i have to admit i was wrong with
that claim ... fortunatly
After some more Bushound logs the ISO check shows up to be not as varying as i first thought. Cheap trick, Sony
EDIT: ...hm, or maybe not so cheap. After some days of playing with my Maxi Image of Dark Messiah the (1 sector) ISO check is suddenly performed in a completly different region -> Securom error 4003
@poseden
Have you encountered the same behaviour with your version of DMOMM ?