http://reviews.reviewboard.org/
What version are you running?
1.5.1
Describe the enhancement and the motivation for it.
I would like the ability to switch out the diff file before saving/publishing the request on Review Board. Sometimes the user will forget a file in the .diff and in order to add it they either need to upload a second diff (And now have 2 cluttering up the request), or start over with a new request.
What operating system are you using? What browser?
Win7 - Firefox 8
Please provide any additional information below.