When you move a node around fast the view layout will start panning

Seems to only be the texture node!

I've never been able to reproduce this! Which Unity version are you running? And are you using Free/Pro?

Unity Free. Happens consistently in the PBRTexture shader i sent you. The Texture2D node, called Base

As of Alpha 0.10, the nodes are moved using a new system. Could you see if the problem is still there? :)