When I'm on the city screen, I somehow hit some keystroke or other, because suddenly the "Close City Window" dialog where "you must close the city window" pops up. I keep clicking on "close city window" but nothing happens. Even after the city window itself is closed. Has anyone else had the same problem? Any suggestions for unfreezing the "close city window" dialog? I saw a similar thread elsewhere on this forum which obliquely refers to this issue but no solution was offered. Only way to get out is to shut down the game and start from latest autosave. Not exactly the one I want especially if I've made some changes since the last autosave. Any thoughts appreciated.Thanks.