I've downloaded 2.0.2 release and found bug same with previous versions.
In function comments_popup_link used following construction:
echo ' title="' . sprintf( __('Comment on %s'), $post->post_title ) .'">';
It's not right because it's possible to create plugin which filter title (for example, Polyglot)
I think you need to change this to something like:
echo ' title="' . sprintf( __('Comment on %s'), the_title('', '', false) ) .'">';