I noticed this in one of the reviews that's been posted:
"The only problem I really had with the controls is scrolling the screen. If you move the mouse to the bottom, where the interface options for the game are, the game itself would sometimes scroll the game and sometimes stay stationary, making it a bit annoying."
So it's not just me.
Link: http://www.nlgaming.com/nl/asp/id_1374/nl/reviewDisp.htm