first off, if you look at it directly at the touch screen you cannot see it.
you have to look at it from behind a little.

also the yellow area seems to change places from time to time...

i have a Hori screen protector, but i dont want to waste it if my DS is slightly defected, as i still have 10 days on the reciept to return it...

I've read on IGN and a couple other sites that its fairly common amd not to worry, but its not too common, id llike to exchange it and a clean one.

anyways:

If you can return it, do it. Also check the serial numbers. There is a list of good serial numbers to get. Let me search for it.

thats the thing.. if i return it.. i wont have one for a while.. and my M3 just arrived (holy crap that was fast).

they are really hard to find still, and i got lucky with this one, someone special ordered it and returned it (unopened).

eh.. i will probably just return it.. it really bugs me seeing the yellow tint. but i wonder why its in different spots on different occasions.?

This is the best I could find.
http://forums.maxconsole.net/showthread.php?t=24832
I could have sworn I had seen a list on GBATemp.net.

I think the whites have better luck than the blacks at having a good touch screen.

That is not meant to be racist.

id return in.

ive got a white lite and i dont have that problem, my first one had a dead pixel though, i just exchanged it.

man, ds' are hard to find? when i got mine (october i think), i just walked into EB and said i wanted a black DS Lite. and that was it...