When I try to download Avast free the window pops up and the gray button doesn't behave as button at all. I can see this error in console:
pageTracker is undefined
The button has the onclick event remarked out:
/*pageTracker._trackEvent('Free Pop-up', 'cs-cz', 'Free button');*/
This makes it normal span.
So guys come on. Even lame web programmers can make base of their sites working for all the time. Even for outdated browsers like FF3 or IE6.
Darker
PS.: Sorry for posting there, but there is no section dedicated for errors on your sites though they evidently occur.