Firefox / Windows Bug - must move mouse to load page?

It was pointed out that my links do not function correctly on Firefox on a Windows platform. When links are clicked, they do not fully display until the mouse is moved!

I have found other posts this evening on the subject (just a few) but with no solution.

This forum will not allow me to post my URL . . .

It is built entirely in HTML and CSS with just a touch of Flash.
I thought it may be due to some fairly intense navigation CSS using a combination on CSS sprites and the "active" state, but even the simple text links on the footer do the same thing:

on "click" the page changes EXCEPT the center <div> which doesn't view until you move the mouse . . . and only in Firefox on a PC . . . .


Any ideas out here?