mozilla/butter — pull request #1622 by cadecairos (2013-03-28 22:02:51+00:00)
Title: Bug #2945 - Stop the draggable update timeout if the track event which w...

...as originally dragged is deleted.

https://webmademovies.lighthouseapp.com/projects/65733-popcorn-maker/tickets/2945-crash-uncaught-typeerror-cannot-read-property-top-of-undefined#ticket-2945-26