[Adam Porter]

I actually just joined the community here to report the exact same problem.

Below is the kernel panic message if it helps anyone troubleshoot.

Fri Jun 24 21:12:30 2011
panic(cpu 7 caller 0x560821): “getPhysicalSegment() out of 32b range 0x3f10000000, len 0x0, class IOGeneralMemoryDescriptor”@/SourceCache/xnu/xnu-1504.15.3/iokit/Kernel/IOMemoryDescriptor.cpp:1594
Backtrace (CPU 7), Frame : Return Address (4 potential args on stack)
0x60e73cc8 : 0x21b837 (0x5dd7fc 0x60e73cfc 0x223ce1 0x0)
0x60e73d18 : 0x560821 (0x5e6dfc 0x10000000 0x3f 0x0)
0x60e73d68 : 0x55d2df (0x80ad100 0x0 0x0 0x8e59380)
0x60e73d88 : 0x55ceee (0x8e59380 0x0 0x0 0x10000)
0x60e73da8 : 0x6107f21a (0x8e59380 0x0 0x0 0xffffffff)
0x60e73e18 : 0x543f60 (0x61430000 0x7f81e00 0x1 0x506b76)
0x60e73e78 : 0x542137 (0x7f81e00 0x61430000 0x8e4f740 0x51a1b0)
0x60e73f28 : 0x5426e9 (0x7f81e00 0x8e51440 0x0 0x516766)
0x60e73f78 : 0x5443d5 (0x7f81e00 0x8 0x60e73fac 0x1)
0x60e73fc8 : 0x2a179c (0x7b342b0 0x0 0x10 0x0)
Kernel Extensions in backtrace (with dependencies):
com.aja.iokit.kona3(8.0)@0x61050000->0x61097fff
dependency: com.apple.iokit.IOSerialFamily(10.0.3)@0x60ea5000
dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x5653a000
dependency: com.apple.iokit.IOAudioFamily(1.8.3fc2)@0x60eba000
dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x61098000

BSD process name corresponding to current thread: kernel_task

Mac OS version:
10K540

Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacPro3,1 (Mac-F42C88C8)

Uninstalling all drivers right now and installing the Combo Update in Safe Mode right now. Hopefully this works