wpa drops out

fwiw, i have been seeing the following:
  o system fine with wpa managing ath0, associated, no wep ...
  o lose association
  o does not regain it
  o kill wpa and restart it
  o it associates and things take off again

7-current two days old, but this has been going on as long as
i have been using wpa, maybe a month.

tell me what you want me to do to get data to help debug.

rnady