Since updating Adobe Flash Player this morning, I have noticed when I load my homepage [http://nz.yahoo.com/] in FF (latest version) I get, after a while of FF being frozen, a message:

I have the same homepage set in IE, which loads without a problem.
Clicking 'no' causes FF to remain frozen, and after a while the message appears again. Clicking 'yes' aborts the script, which appears to be the ad on the right hand side of the webpage.
I am running Windows 7 Home.
Any remedies? Or is it an issue with the script, to be dealt with by Yahoo?
Thanks,
Stevie