Faint white smudge on screen, only shows against white backgrounds

I have the same issue on my Air. I haven't taken it to the Apple Store to have them look at it though.

I too have the same problem and have an appointment with Apple this Saturday.

Has anyone spoken to apple about this? It may seem like a small problem, but is really annoying and of course affects the resell value of the machine.

those are a cluster of stuck pixels. i had the same problem you were describing, and i took it in to get it replaced. it's not repairable by the user.

did they replace the whole machine, or just fit a new screen?

they were nice and replaced the whole machine for me. this was a month after purchase. ymmv.

just to update - i took my macbook air to a genius and he said they'd usually have to send it away for a replacement screen, but as the machine was only two months old they simply gave me a brand new MBA ultimate. I wiped the machine (as I'd installed the lion preview) before the appointment so there was no transfer of data in store.
Even had a chat with the genius about Lion as he hasn't used it yet.
Really impressed with the service - I was expecting to have to plead my case!

This mirrors ALL of my experiences with the Genius Bar- excellent customer service. As long as you are reasonable and and polite and don't go flying off the handle, they take great care of you.

Mine too. Genius Bar has been great to deal with. Very knowledgeable, polite and pleasant to work with. Reminds me of something I heard when I got started in a sales job I had once. "Underpromise and Overdeliver"...
Sly