I have had my 650 for a week and I have noticed over the past few days that the keyboard is getting a little loose on the lower left corner - the "Option" and the "Shift/Find" keys seem loose in their sockets and a tad stickey when you use them. The "Z" key is a little loose too. The Option key also seems to be sitting lower in relation to the other keys.

Nothing to worry about? Or is this potientially a problem?