Careful, I installed the Kona2 update and it hosed my system!
The only conflict that I had was with the HDLink, but I’ve told before that this is normal. The firware had already been updated to the latest.
On Apple startup logo there is a line of black with a couple of sets of vertical blue lines. Command-Option-O-F and Command-Option-S won’t work.
This is on a dual 2.7 w/ the very latest revision of Tiger.