I have a CD Macbook.... Recently I've noticed that my Macbook keeps losing it's connection to my wifi network. The icon in the menu bar still shows it as connected and the signal is at full strength, also in the network pref it says airport is connected but it just stops working. I can't access any urls or even log into the router. I have to manually disconnect from the network and re-connect for it to work again, this is happening a few times per day now as well. All other machines on my network don't have this problem. Failing Airport card perhaps?