ACPI broken with 2.6.4-1.305

[Clarke Brunsdon]

I used up2date to upgrade my laptop to the 2.6.4-1.305 kernel from
2.6.3, and my acpi running 2.6.4 does not work.
I can't use my laptop screen brightness buttons, nor my power button,
nor does the battery monitor work.
But some things are working, like /proc/acpi/thermal/temperature still
spits out my cpu temp.

Browsing through any acpi related lines from my dmesg (there are quite a
few), the only ones that seem to be errors are:

ACPI: AC Adapter [ACAD] (on-line)  
ACPI: Battery Slot [BAT1] (battery absent)
   (My battery is in fact in and my AC is unplugged for this boot)
ACPI: No IRQ known for interrupt pin A of device 0000:00:10.0
   (in the midst of 9 other successful PCI interrupt links)

Meanwhile it looks like its quite successful:

ACPI: Subsystem revision 20040326
ACPI: IRQ9 SCI: Edge Trigger.
ACPI: Interpreter enabled
ACPI: Using PIC for interrupt routing
  (and later on)
PCI: Using ACPI for IRQ routing


My acpid logs show no events logged after it starts
the startup is a little anomalous though, usually it starts up, and
loads one client rule, but with the 2.6.4 kernel it loads two? the same
twice?

acpid log:
[Wed Apr  7 00:31:07 2004] starting up
[Wed Apr  7 00:31:08 2004] 1 rule loaded
[Wed Apr  7 00:36:11 2004] client connected from 1899[500:500]
[Wed Apr  7 00:36:11 2004] 1 client rule loaded
[Wed Apr  7 00:36:11 2004] client connected from 1899[500:500]
[Wed Apr  7 00:36:11 2004] 1 client rule loaded

If i cat info my /proc/acpi/processor/CPU0 i get:
processor id:            0
acpi id:                 0
bus mastering control:   yes
power management:        yes

Which again says it should be good, correct?

I'm at a loss here because I can't find any place that is actually
spitting out errors, and the only thing I've done is upgrade my kernel.
if anyone has any tips, I'd love to hear them

~Clarke