Assume you click on "View the # replies to this message" link:
The faint horizontal gray bar that separates messages appears below the title of the response (bold, left justified) and the name of the author of the response, and time stamp (default text weight) to the right
This, visually, gives the disturbing impression that the title/respondent/time-stamp content line is part of the post above it.
Clearly, the horizontal bar should be above the title/respondent/time-stamp line.
I think I may have mentioned before that when you click the "View All Threads," from a view where you have expanded the responses, you are returned to the top of the "collapsed" page, which means that you have essentially "lost track" of how far down you had scrolled in the page in collapsed view.
Is there a technical reason why expanding the responses to a post, and then restoring the "all threads" view, cannot return you to the "collapsed" page scrolled down to its former position ?
This aspect (returning you to the top) is particularly annoying when you view comments on a long article, and expand them, and then restore the "all thread" view.