BUG: A MMF2 generated HTML5 app freezes with the action "Frame: Set Background Color". I've tested it in Firefox 15, IE9, Chrome 21, and all browsers report this error in the Console:
ReferenceError: ACT_SETFRAMEBDKCOLOR is not defined @ http://localhost:21700/src/Actions.js:172
Probably it hasn't been implemented yet.
Attached an mfa showing this bug.