Also, user avatars break when someone clicks my "About" page
So the thing about this is that you aren't logged in.
When you view someone's about page, it's supposed to show your info on the side panel for some reason (really should show the about user's info still but whatever) and if you aren't logged in, it doesn't know what to display so it displays a broken link. I think this was reported a long time ago but it's never been fixed.
