renames show up as add+remove in Web UI

For example, look at this commit:

https://bitbucket.org/mirror/git/commits/a3df180138b85a603656582bde6df757095618cf

and compare to the way it's displayed here:

http://git.kernel.org/?p=git/git.git;a=commit;h=a3df180138b85a603656582bde6df757095618cf

or here:

http://github.com/git/git/commit/a3df180138b85a603656582bde6df757095618cf (click the "Show Diff Stats" button to see the rename info)

The Bitbucket version shows all the lines of the three renamed files being removed and then added under the new name whereas the kernel.org and GitHub versions only show the diffs for the one file that actually changed.