ceased to highlight the contour of hover.
I have never this behavior not observed), the Contour appears only in the allocation, but not on hover. Noticed only the following nuances:
Sometimes the allocation does not appear to be the median point on the perimeter of the selection. Treated by pressing (and sometimes holding) the CTRL.
Occasionally it is possible to disable the display of the part of selection inside the selected objects. Treatment: View -> Show/Hide edges.
Sometimes, the selection box turns white. Did not understand, than to treat it (already asked the question here).