I installed the CF card from my A600 (ACA630 + A604 and very stable) in the A1200 with ACA1231.
Same resolution but only 16 colour mode. The same guru 8000 0002 errors.
I installed the A1200 CWB CF card and I have put the colour range of the A1200 and ACA1231 to 16. After a while the same guru errors. Its reboots and after a few seconds, only opening the workbench partition, guru 8000 0002 task 081ab070. Repeating the actions results in the same guru but different tasks errors 081ab038 and 081bb6e8.
Hope this information helps.