No power to USB ports

I have a SB61G2. Last week, i upgraded the BIOS (to fb61s03e) and now
my usb ports don't seem to have any power going to them. I won't go so
far as so say the ports are completely non-functional because both
linux and windows XP are able to recognize the controller drivers.
nothing else in the system seems to be malfunctioning and USB (as well
as USB2.0) is enabled in the bios. has anyone else has trouble with
this, or is it possible that something is physically wrong with the
machine and its just coincidence that i upgraded my BIOS at the same
time? thanks.

-Craig