There are 4 rubber feet on the bottom of MacBook Pro. They worked well before. But recently 2 of them (near the touch pad) cannot touch the flat.
I phoned Apple support and she said that this is most likely because the battery is bloated. And she suggested me send my MacBook to the Genius Bar for repair.
But I use several battery status checker apps, such as coconutBattery, battery monitor and the built-in one, they all say my battery is good.
So what happened?