wireless in 2.6.26 considered bad for europeans

After upgrading to 2.6.26 I could not associate with my AP anymore. After searching I noticed that the amount of channels reported by iwlist wlan0 channel had changed. And the channel that my AP was using (13) just disappeared.

I openeded a bug with the iwl people and the end result is: in 2.6.25 the card selected the region for the wireless, in 2.6.26 the cfg80211 system is doing so and the default is 'US'.

So if you are in Europe you need to add a file /etc/modprobe.d/cfg80211-region with as contents:

options cfg80211 ieee80211_regdom=EU