I too have Flip4Mac and no, it does not seem to work for me either. That is of course if I am missing some kind continue button somewhere. Obviously this is a flaw with the website and not your Mac, so no need to fret. I'd call them up if I were you and let their site managers know. Good luck.
-BMF
My local news weather webpage has been updated, now I can't view the "Live Radar." It says I need to install Flip4Mac, which I did, still doesn't work. Same problem in Safari and Firefox. When I view Firefox's and Safari's installed plug-in's, it says Flip4Mac is there. I tried clearing the cache & cookies. Hoping someone can help. The link is:
http://www.koat.com/weather/grid.html
Click on "Live radar"
Macmini, 1.42ghz, tiger 10.4.11, safari Version 3.1.2, firefox 3.0.1

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