> My guess is the 8meg expansion board is the culprit. 

 Good guess, I find that this was one of my problems as well. Disabling,
or not using 16Bit RAM works ok.

> (There have been reports that z2 mem handling is somewhat broken, but I 
> never had the oportunity to really test this, and anyway, I suspect an A3000
> with 12Meg fast is lots faster than an A3000 with 12 meg fast and 8 meg Z2).

 This assumption is true as well.

-- 
Markus Illenseer