Alright, so we know that after updated to 10.5.2 people were still having trouble with Airport. I was one of them, and I figured it out. Here is what I did: 1. Navigate to Library\Preferences\SystemConfiguration 2. Locate com.apple.airport.preferences.plist 3. Drag it to trash 4. Hit the spotlight, type in "Keychain Access" a) Remove all passwords to every network *now I don't know if that's necessary, but I did it, and it worked* 5. Restart Leopard 6. Connect to a network and you should be problem free By deleting com.apple.airport.preferences.plist and restarting your system, you are allowing Leopard to create the new 10.5.2 file. My theory is, is that the two conflicted with each other so it wasn't copied properly, and thats why some people had the problem and some didn't.