What's the URL of the page containing the problem?
http://reviews.review-board.org/r/464/diff/
What steps will reproduce the problem?
1. Go to the "View diff" page of a review request.
2. Click and drag from line 372 to line 377, and click "cancel" in the
pop-up window.
3. Click and drag from line 377 to line 372, and click "cancel" in the
pop-up window.
What is the expected output? What do you see instead?
In 2, the comment should be for 6 lines (and it is).
In 3, the comment should be for 6 lines (it's only for one line - 377).
What operating system are you using? What browser?
Windows XP, Firefox 3