I had heard there was some action between the two coaches, I'll try to find a clip of the altercation and see what happened.
Ok, found a clip. From the video I saw, Harbaugh was excited about the win, and was excitedly running out to mid field with his arms in the air. He got to Schwartz, and shook his hand, and gave him a pat on the back. Schwartz turned around, and then a split second later went running after Harbaugh. Harbaugh was overly excited, and maybe did not need to be celebrating the win so much, but it looks to me like Schwartz made a big deal out of nothing. Hands were shook, and each should have went on his way. I think Schawartz was a little sore at the outcome of the game, was frustrated at the loss, and took Harbaugh's celebrating personally. Both coaches met in the tunnel and apologized immediately afterwards, no fines were deemed necessary, so the situation should be a non issue. It was a heat of the moment, and in hindsight was not that big of a deal. Here's a link to a video clip of the altercation, you tell me.