nervgh/angular-file-upload — pull request #54 by sukei (2014-01-21 09:31:17+00:00)
Title: Copies items formData before sending them.

Angular adds its own metadata to the objects it uses. I think about `ng-repeat` directive which adds a `$$hasKey` property to the objects it iterates over. These metadata are sent to the server when uploading. Using angular.copy removes these metadata and solves the issue.