Empty diff on merge revision
Created originally on Bitbucket by Anonymous
http://dl.dropbox.com/u/4486681/1.ZIP
Here is the sample repository that reproduces an issue. If we put a cursor on r3 (fe3230c0deb8ea7642447a1cdc6d409aab3cd914) - then there is no any files changed, thus we cannot see what have changed since previous revision r0.