IE and DIV problem Options

[Nicola]

Hello, my webpage looks fine in FF, Chrome, Safari, and Opera; but not IE.

I've attached a pared-down version of my page.  testing.html ( 2.5k ) Number of downloads: 505

I think the problem is with my DIVs and their contents. I have two DIVs, and I want to float:left the first objects in both of them; but once the DIV is closed, I want a clean break with no more floating. I styled my DIVs with overflow:hidden and this fixed the problem in most browsers, but not IE. (The table "Proin" is supposed to appear below the table "primis," not beside it.)

Any advice?