Hi,
I am running a KONA LS card and am having the same problem. We have 2 identical Kona, G5 dual 2.3, SCSI raid systems and both have the same problem.
Also, the capture window crashes when you open it most of the time. Very scary.
We have replaced drives, updated drivers and software, wiped the machine, replaced the computer (from a dual 2 to a 2.3), replaced cables, etc. The only constant is the card as far as I can see. Maybe the Kona doesn’t agree with either Tiger or FCP 5.
I wish I knew.