does not work in Firefox 3.6.8 on both windows 7 and osx leopard 10.5.8.
seems to be still functional in firefox windows xp and osx snow leopard 10.6.3
To reproduce. without having air installed on your windows7 or osx leopard machine, go to http://www.tweetdeck.com/desktop/ and click on the "Download" button to begin air install. the "Yes" and "No" buttons are unresponsive. Air will fail to install.