Screen Tearing in Editor?

I just updated to the latest unity and I loaded a project example called StrangeIOC to start learning about Inversion of Control. But when I load the sample scene this happens.

Screen Tearing?

I’ve had this problem in unity before with the GUI in my own project but never found out how to fix it because in my project it only happened when I was loading a level and displaying level loading status.

What is it called when the screen i guess tears like this and how can this be fixed?

It looks like you’re not clearing the camera, select the Main Camera from the Hierarchy and ensure the Clear Flags are either Skybox or Solid Color