Loose closing hinge

I'm not sure what exactly you call it, the plastic hooks that keep your notebook closed when you shut it? Well about three weeks ago I bought an IBM T42 and its a very nice machine, however for about a couple weeks I've noticed that when I close it (how do I explain this..) there's just a tiny gap open, you can't see it actually but you know it's there cause you can just slightly close the laptop screen further. But like I said, the gap is very tiny, very tiny, but noticable to the feel of it. I checked the hooks on the top of the screen and you can jiggle them a little bit. And so when you close it, you feel you can always close the screen a bit more cause theres a tiny space existing. It's nothing real bad, and its something I can live with, but I'm just wondering if I should get it fixed (or replaced) considering it's under the 1-year warrenty, or is this something pretty normal and commmon amongst laptops? I just don't want it getting worse either. I'm very sure it came this way. Any help would be appreciated, thanks.