I was getting weird behavior from the servo and whiney error messages when uploading scripts. With the assistance of the internet, I found out that not all USB ports are created equal. Obviously there different specs, but also where everything hooks up. Basically, by going through the front I was using a port on a hub, and that was my problem. One I plugged in to the back of my computer, I typed a number, and that’s where it went.
Peter's stuff.