Alright, so I added the part you listed to the bottom of my stylesheet, and playing with the margins caused the categories to have no space between them. After some more fooling around, I've managed to get them to appear 2 side by side, then a 3rd one below them. Then 2, then 1 again, then 2 then 1.

In IE, I have it working properly in that there's 3 per row, but the sizes of them are no longer uniform, they are only as big as needed for the image/text that they contain, not sure how or when that switched up.

Any idea why they won't display 3 across in firefox still? And how I managed to get them un-uniform in size in the IE display?

Oh, and I tried switching it to 2 Categories per row maximum, and that only caused it to go back to single file display in Firefox. It showed up as 2 categories per row in IE, but the size was still all wonky.

Thanks again for all your ideas and help,
Cheers,
Ravyn