Hi, just got my Nexus last week and I noticed that the screen has some very visible vertical and horizontal lines. Can you guys tell me if this is normal? Looks more visible in real life than the pictures. Thanks!

It's been there all along actually. Just that I thought it was normal.
Sorry for making you post that link again, but it's very helpful. Thanks to everyone for your replies! I'll be going to Samsung Service Center tomorrow.

The warranty started last Thursday. If I go tomorrow, can I ask for an exchange? Not sure about Samsung's exchange policy.