Just installed this build yesterday. My first install of MC19. I noticed very high CPU usage when nothing was happening. Earlier I had watched a show on our TV using Gizmo, but that had ended and I had exited Gizmo. The status bar (?) at the bottom said something like "Finished Updating Tags".
With the whole computer sitting idle and MC not showing anything, I had a steady CPU of 28% of a quad core machine w/8MB RAM.
Any ideas?