avex7 wrote:
i have this problem too. i am worried it will permanently scratch the screen after some time.
Don't be worried. I've owned several PowerBooks/MacBook Pros and these marks are usually just finger oils transferred to the screen. They are not actual damage to the screen. I have always - always - been able to remove them with a simple cloth and maybe a little water or breathing on the screen.
I just looked at this early 2008 MacBook Pro screen and I don't even see key marks in it. I think it's because I started using a second foam sleeve in my bag. The marks are far more likely to occur if you jam it in a bag full of other stuff so that the lid gets compressed against the screen during transport, which is just not good for about ten reasons other than some screen marks.
I haven't seen the new MacBook Pros but if the screen really is covered by glass, then there should be even less chance of a permanent problem because glass is harder and much more scratch-resistant than the plastic of these older screens.
It also helps to be pretty disciplined about typing with clean fingers; if you're eating always wiping fingers before typing. I've seen some pretty gross looking laptop keyboards out there and mine's a lot cleaner, so there is less to transfer onto the screen to start with.
