This isn't a very game breaking error, but it may have something to do with the switch over.
If you load a design, and then click "Play" practically before the bubbles appear, the design does not load. This effect can best be found if you click on the flash interface several times whilst it is loading. For me, the page simply goes to the main menu. Could others check to see if a similar thing happens for them?
Registered user, WinXP, Google Chrome (some version)