Example: http://www.thunder1045.com/2003

It's intermittent too, it doesn't always happen. The nav bar is flash. And sometimes disappears if you scroll down the page. There is also a flash button in the top nav "Thunderworkforce" that is fine.

I have noticed Flash elements disappearing on a PC's before (this example only happens in Internet Explorer for mac). It doesn't happen on Netscape for Mac.

Any suggestions?