Sanctuaryforever,
I too have the lines you are talking about, so you are not alone. I don't know whether it is a quirk of the video card, but perhaps for comparison mine is a Geforce 7300GS PCI graphics card. I probably would never have noticed these lines (which appear part of the grid or border structure) without you having mentioned them, but I'm certainly not going to worry about them. I wouldn't think they have anything to do with the database entries themselves.
Hope this helps