On Mouse move handling: in the recent Builds we added the requirement of holding the Shift key to enable operation of tools such as {VectorROI,ZoomByWindow} etc. This was due to the addition of the Window Center\Width functionality that required to analyze regular moves.
Now this requirement of pressing Shift is removed (i.e. UI restored to the pre-Build 196 state).
The only tool that requires pressing Shift is "Select by Window".
Window center\width is working as advertised.