Screen Going Black During Loading

I have this problem that has occured recently. While loading a new area, my screen would first show a loading screen, then immediately turn black for a couple of seconds. After the couple of seconds, my screen would turn back to the loading screen and then proceed to play the game.

I don't really now if its a problem or not, having your screen turn fully black when loading. Its only happened recently, and before I would only view the loading screen in between areas.

Is anything wrong? Can I fix it? It just worries me because when that began to happen, my computer has started to run a little wierd. I don't know if this was a direct cause, but its worth to note.

This only happens to me in Vista so it's probably a driver issue.