How do I set a custom avatar for my account profile in Mountain Lion? I just got Mountain Lion. On previous versions of OS X, I could choose a photo from the filesystem as my account avatar. This doesn't seem possible under the Users &amp; Groups section of System Preferences.



Any ideas on how to do this?
I haven't found a way to choose a photo from that popup dialog, but you can add one by dragging an image file onto the picture itself (that dialog may have to be closed for this to work).