Summary: Machinarium is fun to play, but I got maybe halfway through when all my saved games all disappeared. Where'd they go? Turns out that your saved games disappear should you clear your browser cache. Clearing your browser cache is recommended maintenance, and essential for developers such as myself. The game developers saved themselves a little work by using the same storage Flash uses for files from the web.
Summary: On a PC, the games works wonderfully well with Flash Player 10. I heartily endorse all the positive comments posted elsewhere about the game itself. However, Mac users need to know the game does not load with Flash Player 10 in OS.X. The workaround is to uninstall v.10 and re-install v.9. Quite a chore but the game will then work. Problem is you will find large numbers of websites are now optimised for FP 10 and will not load content if you have v.9.
Summary: beware mac users, although the limited fan edition says it's pc/mac compatible, it does include, at least in my case, only the windows version, so, if you want it for the extras, fine i guess, but if oyu intend to play you won't be able to use it in mac os. too bad.