Was having some issues with my 1200 locking up with the ACA1230/28.
Sometimes I would get video corruption other times just a hard lock.
Seemed worse with the ACATune software in the startup. Removed it and it was better, though still occasionally seeing issues. It would lock up within 30 seconds of starting the Jesus on E's demo if I had the ACATune software loaded.
Performed the timing fix and I can say it appears to have fixed the issue! Removed both E123C and E125C and the problems appear to be gone. Been running Jesus on E's for about 25 minutes straight with NO problems with the ACATune running.
Need to do some more testing, but I feel confident this resolved my issues.
PNY 4GB CF card
ATX power supply