Well, I bought a new macbook last May12, 2009, and it was exciting to use a mac for the first time. At the first four days, my enter key works with text edit, google (instead clicking search I'd press enter key). After that, I updated my mac- then my enter key didn't work, it was Saturday I think. It worked when I restarted my mac. After that, my enter key works again- and I had no problem then. Then, Monday- my key doesn't work totally, I was so frustrated. It only worked when it asks for a password in start-up; after that- it won't work in text edit, internet, just like the incident on Saturday. My sticky and slow keys are turned off btw... And so I called to the apple center and they said that I would bring my mac. They said it was from the software update (if updating it is bad in the first place- why didn't they tell me, right). They refused to replace it- but when that mac hang-up they replaced it. So today, I got my mac replaced and I'm using it now^^. So, the software of this newer mac hasn't been updated yet and my "ENTER" key only works when asking for a password in start-up. Wow, really- I'm pissed off right now. I'm actually using my newer mac right now and I apologize if it's long, my enter key doesn't work... Please do help. I'm using the latest Aluminum Macbook 2Ghz...