TF(Latest)+Yosemite Window Drawing Issue

Sometimes (most of the time) when opening a new Finder window from the Dock with a single click when the Finder window opens a portion of the Dock remains on the screen for a split second (some part of the top of the Dock, up to the top half). This never occurs with TF uninstalled so it must be related. I tried to capture a screen shot but was not quick enough to capture it. I am running on a rMBP 10,1 with 16G RAM.