I upgraded to Wheezy yesterday, I thought everything was up to date. I had "deb http://mozilla.debian.net/ wheezy-backports iceweasel-release" in my sources.list. My Iceweasel user agent at this moment says "Firefox/13.0"!

Nothing refused to work, just nag messages on various websites. But Firebug, the highest I could go was something like version 1.5 and the older versions starting junking up my context menu. Figured it was time to upgrade and start a Hacker News rant ;-)