Yes, I did contact AJA and I just got an email that they will process a RMA. Thats just an amazing service I think after two emails.
Anyway, I did uninstall the drivers and reinstalled them, but that didn’t help.
Today I installed Tiger on a firewire drive and boot from there. I could edit for some time, but when I opened Log and Transfer the computer crashed again.
Slot 4 is the only slot I didn’t try. I’ll try that tomorrow when I get to work again.
Thanks for your help, Martijn.