Xcode 4 is showing me grey \"M\" and \"A\" icons next to my files in the project navigator. I believe they\'re related to source control.
The point is this: All my o
Those icons stand for Added / Modified files under source control, like other devs pointed out.
If you're experiencing that these icons appear even if you did not check the "Git" checkbox when creating a new project, and if you're sure your project is not really under source control, then just do this:
Restart Xcode, and the issue is gone for your project. The icons disappear and everything is fine :-)
It's a weird Xcode Bug.