@yorgle, I guess they updated "Instant Music" at some point, since when I got my first A500 (1.3 something), it was bundled with Instant Music and as far as i recall, worked fine.
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Plenty of games will work on KS1.2 but not 1.3. Whereas I don't know of any that will work on 1.3 but not 1.2. Therefore it's always best to use KS1.2.
I believe that the most recent reincarnation of this very old thread has moved beyond the title, and if one picks up with post #42 (based on earlier discussions), then you will find a different area of concern over compatibility.
