I didn’t think it was going to be this quick. Apple updates its Leopard to fix Login, Keychain, and Wireless issues (Article ID: 306804). I realize that I have wireless problem after several days of using Leopard. The signal strength has decreased and intermittent flapping issue although I’m using wireless within 5 meters range with nothing blocking the signal.

After updating Leopard, seems that it does not fix the signal strength problem but the network flapping issue seems has been rectified. Let me monitor it for the next several days.

There is also a forum discussing these issues.