Got black 2.0Ghz CD2 w/2GB RAM about two weeks ago, and have been relatively happy with it. However, over the past week, I have noticed it start to stall in certain places -- especially when trying to quit out of programs. Sometimes a normal quit doesn't work and I have to force quit. And I'm not talking about when the program itself is acting funky or is stalling. It happens under normal circumstances, like when I want to shut down my computer at the end of the day. It seems to happen most with Mail and AIM. But I have just decided to roll with it. However, last night it would not connect to my wireless router at home. I figured it was something with the phone company -- available local signals kept going in and out -- so I waited until this morning. Well, today, same problem. Airport is on. It sees my network/router/signal, but whenever I select it, it says that there was an error trying to connect. Right now, I am typing this on my G4 through the same wireless, which found the connection automatically like it always has, and like my MB was doing up until last night. That said, it's obviously not the router or signal. I've gone in to System Preferences and rechecked my network applications and everything looks fine. Any thoughts, or do I need to bring it to the Genius Bar?