Hello,

Interesting, I have exactly the same problem, my machine is equiped with a 7800GT 256mb.

It works perfectly with arch=i386 in com.apple.Boot.plist, but if I boot in 64 bits I got that Kernel Panic when minimizing windows, etc.

Well, I will be in 32 bits world a little bit more

I've heard of other people with 256MB cards having trouble, I wonder if that's the problem here. FYI: I picked up an 8800GT with 512mb for $60.00 on ebay and haven't had that problem since.

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System 1: Gigabyte GA-P35-DS4 MB with Intel e6750 Core 2 Duo w/8 GB RAM (Retail install)
GeForce 8800GT 512MB, Snow Leopard 10.6.2
System 2: Dell Optiplex GX280, Intel P4 3.0Ghz w/3GB RAM
GeForce 7800GTX 256 MB, Leopard 10.5.7 using iATKOS v.7 install (work in progress)

Update: This day the Kernel Panics returns for me. I Dont see them for over a Month or so, today it hit me very hard. Every Hour or Two i have KP related to the geforce.kext.
To remember : i dont have a 256mb Card, i have a 9600GT with 512mb.

I have change NOTHING. The Computer runs fine for months and i dont to Anything. I cant explain it. Maybe it is the card? With the Panic comes so Random it is hard to pinpoint it down.

Someone any Idea?

Here are a few System Infos:

10.6.1 Vanilla, Patch DSDT, EFI String for Graphiccard, Chameleon RC2.