Fud,
I'm not sure of the technical aspect of it but I know Skuzzy reccomends that you enable Vsync to avoid abnomallities. Rubber bullet syndrom being one of those abnomalities. I'd assume that packets of imformation are being lost but I'm not sure of that.
STX, goto control panel find your video card settings,could be an Nvidea control or ATI depending on your vidcard,then goto 3d settings and enable Vsync or in some cases force on Vsync. this keeps frame rate tied to refreshrate so in normal systems you have 60 hz refreshrate and 60 FPS.
This is of course in laymans terms and I'm sure more inteligent guys than myself can explain it in detail if needed.