I think I've figured it out... I made the header from a Photoshop sliced image, and there's an extra bunch of cells at the bottom of the table with a blank spacer image in them - gonna be tricky getting rid of only those. I've had a few botched up attempts lol.
Could you have a look at it? I'm having no luck... there's a whole bunch of extra cells at the bottom of the table (I put a border on so you can see).
Here it is.