Drag and Drop, Motion Paths, and Flash/HTML
An interesting, but frustrating discovery: when you drag items on a motion path, they visually show the drag path in Flash, but show nothing in HTML5. Thus courses in Flash give the user that visual feedback, but HTML5 does not. You can still drag/drop the items in either, but without that feedback, it's confusing as heck for the users. I doubt there are any workarounds, as a search turned up nothing on this subject, but if there are, let me know!