Next to comments there are two 'buttons', one's an upward pointing triangle to exclaim "this is a great comment" (at least that's the text in the hover-over) and one's a flag to flag the comment as "unconstructive, offensive, or spam". If I click the triangle alongside Wheat Williams' comment under this question nothing happens. I'm expecting the triangle to change colour to indicate that I've clicked it. What should happen?
(N.B. I'm using the desktop IE10 Consumer Preview on Win8 Consumer preview)