On my new laptop (Dell Studio 55), with 64-bit Windows 7 pre-installed, I have noticed a funny phenomenon with the cursor. As I move it around the screen with the touchpad, every once in a while it sticks at a position, turning into something like a VCR control icon. This does not seem to be asociated with any particular location. I can only get the cursor to continue moving by wrenching it very quickly. This is very annoying. What is going on, and how can I fix it (if it is a bug) or understand its functionality (if it is a feature)?