That sure is an odd problem Netsi. I can't even imagine how that can happen because as far as I know there is no 'page resize' mode until your mouse hovers over the bottom or right edges. Your mouse cursor clearly shows that you are right. Have you recently bought a new mouse and installed some new drivers for it? I've never seen this happen before, so I'm only guessing.
Maybe you can remove the application and reinstall it? Or have you already tried this?