Slicing in Image Ready

I still can't view the memories, so *do* forgive me if I'm repeating a lot, which I don't doubt.

I've been having trouble slicing in IR. I know how to do it and I can get the file and everything alright -- but when I put up the images, they're always a little separated, usually by a pixel. In most layouts it's easy to hide, but *this one* is giving me pure trouble.

Any ideas on how to fix this? Whether in IR, or with the HTML? I never understood tables so maybe it's there. I'm at a dead end. Any help is appreciated!!

Thanks.