Heads-up: Atheros ath9k users and 2.6.30 update

[Michael Cronenworth]

Beware of the 2.6.30 kernel that was just released in updates. There's 
an outstanding bug[1] that bit me after updating. You'll suffer 
significant signal loss and probably be dropped from your AP. Returning 
to 2.6.29 (at grub time) will bring you back to sanity.

Note: Turning off power management helps if you have it on. (iwconfig 
wlan0 power off)

[1] http://bugzilla.kernel.org/show_bug.cgi?id=13807