Fn+F5 was previously assigned to "radio" which is fairly useless under X.
Switch it to "wlan".
Reported in http://bugs.debian.org/504643
0x01 battery # Fn+F2
0x02 screenlock # Fn+F3
0x03 sleep # Fn+F4
-0x04 radio # Fn+F5
+0x04 wlan # Fn+F5
0x06 switchvideomode # Fn+F7
0x07 zoom # Fn+F8 screen expand
0x08 f24 # Fn+F9 undock
0x1 screenlock # Fn+F2
0x2 battery # Fn+F3
0x3 sleep # Fn+F4
-0x4 radio # Fn+F5
+0x4 wlan # Fn+F5
0x6 switchvideomode # Fn+F7
0x7 f22 # Fn+F8 touchpadtoggle
0x8 f24 # Fn+F9 undock