What version are you running?
3.0 alpha 0
What's the URL of the page containing the problem?
http://demo.reviewboard.org/r/372/diff/1-2/
What steps will reproduce the problem?

git add $new_file
git commit -am 'test'
rbt post
Publish RB
git mv $new_file $moved_file_name
git commit -am 'moved'
rbt post
Publish RB


What is the expected output? What do you see instead?
Expect to see green on the new file and red on the old file.

Instead, see green on both files.

This is visible in the intermediate diff, e.g. Diff 1 to Diff 2
What operating system are you using? What browser?
Chrome, running on OS X
Please provide any additional information below.
THe URL should link to the page with the bug. Thanks!