All, I guess the wifi problem is wide spread, but I recently started having it after the latest EFI update. My wifi will work fine, I will close the lid over night or for a few hours and when I open it I can't connect to the internet. The wifi icon still shows I am connected, but it isn't connected to the internet, messages, etc. I can toggle it off and on (wifi) a few times and it might work or I can reboot to get it to work. Does anyone know what I could do to fix this? I have applecare on it. I spoke to someone at Apple on the phone yesterday. He had me press option, command, shift and the power button momentarily. When I did this and rebooted I couldn't reproduce the problem, but that was only because I didn't leave it closed for very long. He also told me that I should shut down my systems when I'm not going to use them - overnight or extended periods of time. I haven't done this since I started using Macs...has anything changed that is reason for doing this?