ath0 bug in current?

[Vincent <10.50%free.fr@localhost>]

Hi there,

since I compiled the latest -current this morning, my ath0 cardbus 
Wificard stopped working. It detects no AP anymore. Here is a dump after 
a sysctl -w hw.ath0.debug=1

ath_init: if_flags 0xffff8803
ath_stop_locked: invalid 0 if_flags 0xffff8803
ath_tx_start: m 0xc1276300 len 46
NODS 00:0f:b5:64:19:a8->ff:ff:ff:ff:ff:ff(ff:ff:ff:ff:ff:ff) probe_req 1M
 4000 0000 ffff ffff ffff 000f b564 19a8 ffff ffff ffff 0000 0000 0108 
8284 8b96
 0c12 1824 3204 3048 606c
ath_tx_start: 0: 00000000 2f4b83b0 2134002e 0100002a 00040000 0000001b
ath_tx_start: TXDP[1] = 1dbc320 (0xcb8f4320) depth 1
ath_start: discard data packet, state SCAN
ath_start: discard data packet, state SCAN
ath_start: discard data packet, state SCAN

and this is repeated ad libidum with only TXDP address changing.

At launch, the card seems to associate itself with the AP, but the WPA 
authentication exchange times out and then no further try happens since 
the card is unable to relocate the AP.

Reverting to a 4.99.55 kernel makes all things work again.

Any clue?
Thanks,
Vincent