FreeBSD 10.3 Problem on Xserve G5

[Bill Sorenson]

Now that 10.3 has settled down and will be official released any day,
I decided to try building releng/10.3 on my Xserve G5. Everything
builds smoothly but when I reboot on the 10.3 kernel I get this
console message:

 WARNING: Current temperature (PCI SLOTS: 90.5 C) exceeds critical
temperature (60.0 C); count=4

Once it gets mad enough the system reboots and starts over. If I boot
it up with my 10.2 kernel.old, everything is fine.

Something seems off with the hardware monitoring in 10.3. Is there a
knob I can tweak to fix it or is it a real bug?

Thanks,
Bill S.