Answer to "Cursor jumping randomly when typing"I am having the same problem with my MacBook Air, just two weeks old. I tried unblocking all of the trackpad commands, but not only did that not work, the commands still operate! And this is after rebooting as well. I was able to find a jury-rigged solution, however. By taping a 3x5 index card over the trackpad, along the top edge of it (there will be some trackpad surface showing at bottom but my palms don’t reach that far) I seem to have mostly anesthetized the sensitivity, and as a bonus, can still use the trackpad features through the card. I still plan to bring the machine into Apple, since it is unacceptable to pay so much money for something with such a basic flaw; and it appears from reading these comments it has been going on for some time.