Hmmm, thats odd............as far as I know.the A1000 was the most compatible Amiga of all. From my experience PAL games just ran in NTSC mode with the bottom of the screen slightly cut off. I never had a problem with any games thaty I remember, except if they required more than 512k of RAM wich I didnt have.
I ran Kickstart 1.3................1.2 for Alien Syndrome specifically......didnt work with 1.3 for some reason.