Chrome 8.0.552.11 dev - works

Chromium 7.0.517.44 (64615) - works

Firefox 3.6.12 - Shows a "browser not supported" page, clicking through makes it work just fine. Did notice though that the animation only happens when the window has focus - probably a nice addition so it doesn't chomp CPU time in the background.

Firefox 4.0b8pre - Fails. Blank screen.

Opera 10.60 (6344) - "Browser not supported" page. Animations do not work, logo doesn't render. Seems to fail gracefully (login fields still accessible).

IE6 (windows xp) - Fails. Does not degrade gracefully.

IE 7.0.5730.13 (windows xp) - Different warning page than FF/Opera. Degrades gracefully, no animation.

So far seems to be pretty focused on webkit browsers. No huge surprise there. What was interesting was that IE6 wasn't supported at all. There isn't even any "continue anyway" button after the "browser not supported" page.