Hi, on my GF's late 2009 White Macbook, I just noticed this today. I rebooted her computer and upon start up, the clock was reset to Dec. 31, 2000 and the network was not remembered. After typing in the router pw and logging in I got 4-5 incoming firewall messages (cmbd, KRB5KDC and nmblookup) something along those lines. I denied them all. I thought this was awkward so I rebooted again and the same thing happened. Clock is set to auto from apple.com. Upon closing the lid and letting it sleep and opening back up, the network was forgotten again and I had to log in with pw again. No firewall issues upon wake though. running OSX 10.6.3 btw no similar problems on my own 2010MBP I rebooted and etc and it found the network by itself etc etc.