I bought an early-2011 MacBook Pro 15" (highest-spec model) in June. It's running Lion.
I have a problem which happens occasionally. My power adapter (while plugged in) from time to time (particularly when I play games) turns orange and shows me on the bottom of the screen that there is "0:09" or "0:10" minutes left. However, when I push on the battery menu icon for the detailed information, it shows me "99% Full".