http://reviews.reviewboard.org/
What version are you running?
1.0.9
What's the URL of the page this enhancement relates to, if any?
reviewboard.host.server/r/123456/diff
Describe the enhancement and the motivation for it.
In release 2009.1 or thereabouts, Perforce added a first-class "move" operation, improving on the old integ-and-delete-and-edit way of moving files. Among other improvements, it can handle cases where you need to edit a file while moving it in the same change, and diff works reasonably for such files.
However, reviewboard diffs still show the file as entirely deleted, and entirely added, with none of the nice color highlighting for the regions that did/did not actually change.
What operating system are you using? What browser?
OS X 10.6, Chrome 9.
Please provide any additional information below.