Grid layout is not working properly in Firefox

I have down loaded Grid Layout from zen-cart free add-on. It works great in IE, but it did not work properly in Firefox. The product images are misplaced, some are even overlapped. I had a look at html code. It looks fine. I do believe this could scare away Firefox users. What else I can do to fix this?

My website is at:
http://www.swimwearplace.com

Thanks in advance.

I have figured out what the problem is. Table cell was coded with the following style sheet:
{float:left;}

Removed this, and the problem is gone.

Thanks.

domfang,

I have figured out what the problem is. Table cell was coded with the following style sheet:
{float:left;}

Can you please elaborate on exactly what you did. I think this is my problem that I've been trying to sort through for days now on this thread.

What element in the stylesheet? What layout file? Where?

Thank you so much!

MC