I currently manage two sites and noticed that the Admin Bar is different on both and one has a broken image in it. Here's where you can see each admin bar:
Site 1's bar displays Dashboard, Edit Post, Add New, Comments, Appearance, Shortlink, Views over (broken image). Site 2's bar displays Dashboard, Add New, Comments, Appearance, Updates.
I have not customized the Bar for either site. Also, the one with more info and a broken link, the Bar remained completely unchanged on site 1 even after I went to a more updated/recent theme, one built for WP 3.2+.
Why would one have more content by default along with a broken image?