My Macbook works fine with my normal computer resolution. But I recently bought a new VGA cable to connect my Macbook to my HDTV in order to watch movies. But now, when it is all connected, although the resolution is correct, there appears to be ghost images around objects such as icons and windows. This is not as noticeable when watching videos in full screen. but still very annoying when return to the desktop. Has anyone else had a similar problem? I've connected a PC to the TV before and it looked fine.