Dan is having an issue where on his MacBook the cursor jumps while he's typing. He can't even write an email. It'll even start a command. Leo suspects it's a problem with the trackpad. He should try cleaning it first. Sometimes "schmutz" can cause phantom touches. The palm rejection software in the OS may have been disabled. The worst case scenario is that the trackpad is failing. Since the laptop is about a year old, he could take it into the Apple Store and have them take a look at it.