freebsd stable - Mar 2005 - 5.4-BETA1 ACPI problems

Testing out 5.4 BETA1 tonight, I encountered a hang with ACPI enabled 
and a fatal trap 9 with it disabled. The hang was after detecting ACPI. 
I've tried changing settings in the BIOS, but without success. Any 
suggestions would be welcome. I can gather debugging info if desired. 
Please reply in private if in a hurry, I subscribe in digest mode currently.

Thanks,
Steve

Following up to myself for the archives, this problem was solved with a 
BIOS upgrade. This is on an Asus P4P800-E Deluxe (865PE). Old BIOS rev 
was 1002, new is 1004.

Sorry for the noise.

Steve