Why would you use flash for something like kontain.com? It feels so weird. Nearly everything you see there could easily be done with html. Doing it in Flash only means that you are going to create a lot of inconsistencies with the way everything normally works. Strange context menus. Strange selection colors. Strange click behaviours. And so on.

Why would you want that? That’s crazy. Flash should be used as a last ressort. Video. Games. That sort of stuff. Use friggin’ html for the rest and do not confuse your users.