Works very smooth for me (Win 7, Firefox 3.6.8). <rant> As a sidenote, this difference of experience highlights a big problem with rich web applications. Y

Works very smooth for me (Win 7, Firefox 3.6.8). <rant> As a sidenote, this difference of experience highlights a big problem with rich web applications. You get so high variance in performance depending on a particular combination of hardware, OS and browser that you are virtually predestined to fail hard for some non-negligible part of your userbase (unless your application is so trivial that even on the worst possible platform it would still work ok). I know, this problem existed with classical games all the time. But there, gamers pretty much came to terms with "hardware requirements" (needed to play the game at all). With web, expectations are for some reason different. It used to be quite expected and acceptable to buy new GPU/CPU/RAM to play a particular desktop game, yet it seems like too much work just to fire a different browser and copy & paste URL. I know I'm guilty of this myself, despite being developer and regularly working simultaneously with multiple browsers. And it's just going to get worse as performance spread will widen, both on low-end (more people accessing web through mobile devices) and on high-end (as HW acceleration slowly comes to new generation of browsers). </rant>