Recently I noticed the icons not working on user pages(OS icon and gear on the sidebar), and also noticed that they are now characters instead of actual images. The problem doesn’t appear to happen in chrome but it does in Firefox 31.
Sidebar: http://i.imgur.com/zgzfb6i.png
OS: http://i.imgur.com/gOm9quq.png
Not really a big issue but kind of annoying to look at