Take a gander at the horrible troll article full of FUD over at http://www.dailytech.com/Article.aspx?newsid=6702&red=y#comments and after it has loaded, click on the titles of one of the comments (such as mine). I get an odd repaint issue as it tries to show only that one comment.
This is not a regression, sadly.
Only seems to happen for me if you're not scrolled all the way to the bottom.
Created attachment 14569 [details] Reduction
This works fine for me on trunk.