I am looking at the rev control for this question and on my screen in Chrome 13.0.7 it looks like this:
This should be remedied because it can get hard to read if the title is more than one line.
It might just be a minor css issue.
The same happens if you click on the second option for side by side diffs:
This was an issue in July (on profile pages):
Problem displaying title revisions on profile activity tab, and it was marked as status-completed -- so it is probably the same issue, and just as easy to fix.