I'm having the same problem with Selenium. Did you already resolve this?

I was trying to automatically test my page using Seleinum.
On my page I have plupload using HTML5.

When I'm adding file using plupload I have system window where I can select file I'm interested in. Is it possible to omit this step?

If I know the absolute path to my file can I setup plupload component using javascript and start file upload?

I can do some thing like:

var uploader = $("#uploader").pluploadQueue();
var id = plupload.guid();
var file = new plupload.File(id, "myFile.txt", 6543);
uploader.trigger("FilesAdded", [file]);

This will fail obviously but mabe there is some simillar way of doing it?