me too. Since I have been moved to version 20 I have this issue. Quicksave & quickload don't work either. Last night I reinstalled, but Steam automatically upgrades to version 20. Before version 20 I didn't have the issue. Starting with directX 9 or 11 don't make a difference either. I will stop playing for now. Without possibility to re-load a game only by exiting the game and doing a restart makes no fun. Also when I w/o thinking push the quicksave button I crash. Can we please get an upgrade soon!!!!
extra note: When I do a quicksave via the ESC menu, game doesn't crash. It'll take a long pause, but then returns. W/o quick saving game!
So, starting new game, and then loading a savegame works. But then ingame, reloading savegames make game crash. Before patch 20 game was working ok.