I was watching an episode of the Wood Whisperer on YouTube, and he was making a frame for a mirror. At one point in the video he was going to put a round-over on the frame and was using an electric router for it. He said that the rule is "on the outside of the frame, go counter clockwise; on the inside go clockwise". He didn't give a reason.
Now, I am a hand tool guy and my idea of a router is a good old Record 71.
Image courtesy Record Planes
I understand grain direction and wanting to work with it; not against it. From what I have been told you generally don't have to worry about it when using power tools. Why would the direction you are going around a frame matter as stated in the video?