Comment 21 for bug 50099

I can confirm this on a Feisty machine that uses wireless (madwifi drivers)

My /etc/network/interfaces has 'auto ath0' and 'wpa-conf /etc/wpa_supplicant.conf' lines in it.

I have to manually do ifdown ath0; ifup ath0 to get it to come up properly.
Sticking that in /etc/rc.local seems to do the trick, but it would be nice not to have to do that.