Kernel stack corrupted with F12 Alpha LiveCD

Mon Aug 31 15:39:44 UTC 2009

I have just downloaded F12 Alpha LiveCD and when I try to boot, it stops at
this message:
Starting udev: kernel panic - not syncing: stack-protector: kernel stack is
corrupted in fa31c859

I have verified the image and it is right. After googling a little, I have
tried with "acpi=off" as parameter and then starts OK, but I loose my WiFi.

Is this problem worth a bug? What additional info can I provide?
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