USB mouse not detected on boot of 7-STABLE

[Luke Dean]

I'm tracking 7-STABLE.
Recently.. within the last month or so..  my simple USB mouse stopped
being detected at boot time.
The /dev/ums0 device simply does not appear unless I unplug the mouse
and plug it back in again.  Then it is detected.

I don't even know where to begin looking for answers to this one.

Is there something I can do to force the system to rescan for my mouse
to save me from crawling around on the floor whenever I reboot?