Earlier today I opened up my 2011 MBP (Lion), changed out the stock RAM for 2x4GB DDR3 RAM sticks (Same specs as stock PC-10600 1333MHz) I booted up my MBP and everything was fine, except the password to my network isn't being accepted. It sees all the networks in the vicinity but isn't accepting my password. I have rebooted and I have checked the "Show Password" box to ensure it isn't a typing error. Other computers are working fine. I doubt these 2 events are correlated in any way, but just felt I should mention.