The image is offset because 1152 X 870 is NOT the native resolution for the display in question. It isn't comparable to your MacBook as the screen sizes differ by 4 inches (and their native resolutions are also different). Change the resolution to its native resolution for best results of 1440x900, which will probably resolve your issue. If that resolution is too large for you, consider downsizing to a smaller LCD -- downsizing LCD panels in resolution (outside their native resolution) will result in poor image quality. Switching the panel to a digital (DVI) connection helps to some degree, but if you're not using the display's native resolution, switching to a digital connection will not fix all your complaints.