Thumbnails do not render on the browsers most visited or top sites tab

[norwood451]

Hi- I recently noticed that my home flash web page does not show a thumbnail on the Google most visited new tabs, Safari top sites, or Firefox. I tried modifying the background page by hiding a .jpg image behind the flash page, but the problem persists and only shows a white page with a blue bar and the address. I looked at a few other flash home pages and noticed they do not render thumbnails also.

Is there a way to have an image show in the thumbnails of the browsers most visited / top site pages when the home page is a flash design?