There is another thread about this. It seems to happen when you uninstall a program and the phone reboots. It happened to me twice. Can't remember what programs I removed.
I guess ill go to the store tomorrow and complain...i've got enough ammo with the tilted trackpad and small light leak when its angled upward (not a issue at all but still)...that and the enter key is a bit weird.
O well, we'll see. If anyone has any info please let me know!