User blog comment:Dopp/Technical Update: October 4, 2011/@comment-3279487-20111008142949/@comment-1066636-20111008175935

I don't think it's an intentional change. Updates often introduce problems with lists in blog comments, simply because the comments themselves are set up as lists (HTML-wise) which are modified via CSS. Changes to the blog CSS frequently do not account for "real" lists inside those fake lists, resulting in certain changes (like the removal of bullets etc) being inherited by the real lists.