carrierwaveuploader/carrierwave-mongoid — pull request #130 by schnittchen (2014-09-26 14:08:11+00:00)
Title: don't announce upcoming attribute change when remove_ virtual setter called with unchecked value

In combination with carrierwave-backgrounder and a "remove" checkbox, this triggered image processing on every form submit, even when there was no change in the uploader. The reason is that the attribute was unconditionally marked as changed by this virtual setter.