In game setup screen, right click a unit and hit "view".
A window pops up labelled "Unit Quick View". It displays the unit's details.
This window is tiny. It appears to about 10-20 characters wide and have a content height of one text line. Even after resizing it, every time I open a new one, it is the same tiny size.
This works fine for me, closing.
This is the same issue reported and fixed in Ticket 3679.