Have you filed a bug report? If not, file one. If so, file another one. Apple doesn't host this forum and is not likely to troll it looking for user gripes.

What kind of encryption are you using on your wireless network? If it is WEP, try switching to WPA. Not only is WPA more secure than WEP, but it seems to be better supported by Apple.

I checked on one of the threads at this link http://discussions.apple.com/thread....readID=1397364as directed by user Macheel. One thing i found that worked for me was to go to SytemPreferences/Network and then unclick the "show airport status in menu bar" For whatever reason it works for me. I hate not being able to see the airport status but it sure speeds things up.

Airport Constantly Scanning
 

The computer will keep scanning for networks whenever the signal from the wireless router becomes too weak. I restarted the Airport base station and that cured the problem for a 10.5.8 MacBook Pro.

I've been a Mac consultant for decades and find that many Airport stations I come across are kind of flakey, either spontaneously resetting themselves to the default configuration or putting out a very weak signal with no network connection.

Don't forget that you don't need to buy an Airport station since any 3rd party wireless router will work.