I just bought the game via Steam, version 1.12, playing on a Windows 7 64bit.
The videos that are supposed to play during the tutorial do not show up. Instead the video window is just black.
Also, after playing for a bit, the selection window in the bottom left and the Empire Tree in top left disappears. I've observed this happen twice already. Restarting the game brought them back. Needless to say, it was very confusing during the tutorial.