The black flash doesn't always occur, it seems like 1 in 5 times it'll happen. It is very jarring when it does though, looks like the game may be about to crash.
Edit: If it helps any, to clarify, the black flash occurs after the background title movie is loaded and displayed, like a second after it is shown immediately following the end of the pre-title movie.
Also, with the pre-title movie, I've only ever seen this black flash happen once, and when it did the words on the screen got scrambled for a moment as well. For whatever reason I cannot get it the issue to repeat on the pre-title screen, so that may have just been a weird computer blip for a second?
Again though, with the transistion from pre-title to title, the black flash happens a good 20% of the time in running the game.