With the last MQ update some new icons were added in. It is very possible that your computer may still be displaying the old icon though, or only displaying it in some places. It is silly, but if you are like me it will get pretty annoying.

The reason is that Windows 7, and possibly vista keep a cache of icons stored. There is no easy way to simply refresh the icon cache either. You can brute force it by deleting the hidden system file that contains the cache, then windows will create a new one on its own.

http://www.sevenforums.com/tutorials/49819-icon-cache-rebuild.html

That is a quick guide on how to accomplish it. Also a quick disclaimer... I can't vouch for the site I linked, it's just something I found on google. I didn't look at the .bat file option so, as always, exercise caution with unfamiliar sites.