BUG: Close (CMD-W) -> Cancel interferes with selection/deselection

Close a window (CMD-W), select “Cancel”, Rhino is unable to select/deselect objects.

Rhino 5.0.2 (5A865), OS X 10.10.5 (14F27)

New document
import DXF file
Close window (CMD-W)
Select Cancel
bugs:
Unable to select/unselect objects in display or use gumball
Selecting different views blanks display windows
Have to close (CMD-W) and select “Don’t Save” to fix things.