mozilla/butter — pull request #1233 by mjschranz (2012-10-22 15:07:22+00:00)
Title: [#2638] Prevent images inside droppable containers being draggable. Ensure drag over class is removed properly

https://webmademovies.lighthouseapp.com/projects/65733/tickets/2638-dragging-images-on-the-video-and-dropping-in-droppable-area-causes-unexpected-error-messages