Bug: Upload is unable to upload the same file twice

com.vaadin.ui.Upload component does not work when setImmediate(true) - http://dev.vaadin.com/ticket/12246
It is reproduced on 7.3.3. If I use setImmediate(false) then I get ugly view with textarea+button, but my customer needs only one button for upload operation.
As I understand there is a simple fix for it but I do not expect that we will see it in nearest releases, so may be
somebody knows any workaround for this issue?