Slideshare website doesn't display or function properly

I'm trying to access the Slideshare site and keep getting an unformatted view and messages that I don't have Flash Player installed.

I do have Flash Player installed (reinstalled latest version today just to make sure) - I can see embedded Slideshare shows on other pages.

I am using MAC OSX 10.5.6 with Firefox 3.03 (also functions same way with Safari)

Is there a problem with the CSS or other functionality on the site or do you think this issue is something peculiar to my machine.

This only began yesterday.

Any clues as to remedying this?