The rewrite the handles personal,upgrade,firefox.html is 3.6 specific. For example, with Firefox 4 beta, go to mozilla.com/firefox. You'll be redirected to upgrade.html, but you should get personal.html.
I should note a couple things, 1) since Firefox 4 is in beta, this isn't a very big deal 2) I've heard these pages are going away, for a simpler firefox vs. non-firefox version
If these do indeed end up going away, then we shouldn't write automated coverage for it, but flagging just to be safe.
When the new site launches we'll jump back to just a Firefox 3.6 user vs everyone else at first, but will start to expand that again as Fx4 comes out and our competitive messaging strategy takes shape. +1 for me on this bug. Alex, thanks for bringing it up.
This is fixed with the redesign. Firefox 4 will go to /firefox/fx/
Restoring unintended removal of in-testsuite flag.