IntelliJ change markers reflecting local changes i

Question

One feature I really like about IntelliJ is the change markers displayed in the gutter of a file under version control.

However, my current system seems to have gotten itself into a state where that area now shows only local changes, not changes with respect to git. I can't find the setting to switch it back.

Is anyone aware of how to do this? I'm using IntelliJ 13.1 community edition on a Mac.

Changes are shown in the project navigation window, so I know it's a settings issue, not that the file isn't being recognized as under version control.