Hi,

My source files under sys/dev/acpi/acpica/Subsystem were caught up 
with acpica-unix-20030123.tar.gz, and it works fine for me.
 
I have put that patch at:
    http://www.ann.hi-ho.ne.jp/~kanaoka/acpica-20030123.diff.gz

 % md5 acpica-20030123.diff.gz
 MD5 (acpica-20030123.diff.gz) = 8022a900c844d23dc7e59d34ba75d106

You can try it like below:

  # cd /usr/src
  # zcat /somewhere/acpica-20030123.diff.gz | patch -p1 -E
 # cd /sys/arch/i386/conf
  # config your-config;cd ../compile/your-config
 # make depend;make;make install

You can find chang log for ACPI CA code at:
    http://developer.intel.com/technology/iapc/acpi/downloads/CHANGES.txt

If you are interested in it,How about trying it?

Best Regards!
---
 Masanori Kanaoka kanaoka@ann.hi-ho.ne.jp