Sometimes the FileDropZone change event will fire after the .files array is populated and sometime it is before.
So I cannot be certain that .files will be populated when the event fires. It is consistent with a particular file - in other words some files always work and some never do. I have been using PDFs, it may be a file size issue causing a delay.
It looks like I can use the parse event instead, but thought this was interesting enough to pass along.
