I purchased Planescape: Torment last night and played it for about ten minutes just to get a feel of things before bed. I started a new game today (I didn't save apparently) and all was fine and dandy for about 10 seconds until the camera started rapidly moving towards the top left part of the screen. If I reload the game, everything works for another few seconds until the same thing happens. This didn't happen at all last night and I don't think anything has changed.

I saw a few rather old threads about this all over the place, but they never seemed to come to a solid solution, which is a little scary. Now that we're living in the future, I was hoping that someone out there might know what's going on. Thank you kindly!

Try restarting your PC.

Have you got alternative input devices, e.g. a game pad connected? If so, try disconnecting all of them except the mouse.