Use the nointro=true command line argument.
This fix has only been tested on the Steam version.
Some users have complained about the screen flickering on Windows 7. A quick fix is to press the Windows button on the keyboard to minimize the game. Upon maximizing, the flickering stops (Changing between the main menu and the campaign/multi-player will require you to do this again).
Sometimes the game's menu stops responding, doesn't see saved games, gives "There are no maps currently available" error, shows visual glitches on character creation screen. This may happen regardless of how many times the game ran correctly. Installing the game in the default folder and turning off gameplay-tracking programs (ex. X-Fire, Raptr, Steam) may fix these issues.