For some reason, my Applications folder is using the Address book icon in the Dock. How do I change this back to the correct icon.
I am using Mac 10.7.2 (although the problem has been there since 10.6).
The icon is not "wrong" : You just have to select "Folder" in the "Display as" menu, not the "Stack".
PS : Just right click on the icon in your dock to make this menu popup.