Cannot move dock icons in Mountain Lion When I drag an existing icon from one place to another in Mountain Lion I cannot click to release it. It just remains 'stuck' to the mouse pointer.

Anyone know how to fix this?
Sometimes with everything running on your Mac it can get clustered and not be as responsive, Try and go to Applications->Utilities->Activity Monitor and Find Dock PID 167. Then click it and Quit process, This will close the dock and reopen it. And that should fix it.