I've been having issues recently not seeing my wireless connection. I managed to track it down to my MacBook not being able to see wireless channels above 11.

My Airport was always set to Channel: Automatic, so it was selecting and broadcasting on 12/13 which I've always been able to connect to.

Apparently my MacBook now no longer can see channels 12/13 and has changed to a US Airport card rather than AU (purchased in Melbourne, AU).

6/03/09 6:45:41 PM kernel en1: 802.11d country code set to 'US'. 6/03/09 6:45:41 PM kernel en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 149 153 157 161 165

From a few days ago, it supported channels 12/13

4/03/09 6:23:14 PM kernel en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140

I've tried turning airport card on/off, zapped PRAM, and can't think of much else to try?

System Profiler says:

Wireless Card Type: AirPort Extreme
Wireless Card Locale: Asia Pacific
Wireless Card Firmware Version: 1.4.8.3
Current Wireless Network: ckAirNet
Wireless Channel: 11

Any ideas?

Cheers,

Christiaan