What is this green dot?

What is that green Dot? And how can I get read of it?
I made this model long time ago, and now I just wonder what is that green dot?
If I go to frame 0 or 1 it turns to a white dot(a little bit smaller) and the rest of the frame it is green.
I’m using version 2.72.
I’m pretty sure it’s not a mesh or something, I only got an armature, the mesh, camera, and a light.
And I don’t have a green material.