Question on Ram....

Hey Everyone. Been looking at the site for awhile, finally joined when I got my unibody Macbook Pro. Been Loving it, well, except for the screen flashing/flickering. Anyways, I have been doing research but couldn't find a specific post about ram in the unibody. Does it negate applecare? I've heard that opening up the back of the unibody negates applecare, but have also heard that changing Ram is ok under applecare. Which is it? Is it ok to get Ram from Crucial and install it myself? Without negating Applecare? Thanks guys.

 

Right, that's what I thought, But recently a screw came out of my girlfriends unibody macbook. We called Apple and they said if we unscrewed the back off her macbook, it would void the warranty. Don't you have to unscrew the back off the new unibodies to get to the ram?