This is a minor update to the patch I posted the other day:

  - Updates processing for completed QTDs, fixing a regression
    I've been chasing for a while.

  - Works around a bug seen in some EHCI silicon (like NEC),
    which the previous problem was covering up.

  - Cleanup: updates the debug support a bit, removes a
    now-fixed FIXME comment, etc; and a version ID change.