ok, i've had my blackbook for almost a year now, and everything's been fine up until acouple of weeks when i've started to notice slight changes in the display brightness. Something fast, like if you play a little bit with the brightness keys. It seemed to me like a sensor or something. Well last night i had my blackbook next to my girl's white macbook and i seem to find her display a little brighter than mine. So this is where i'm now SURE there's something wrong with my display's sensor. Have anyone experience this problem? i'm still under the year warranty so i asume i could send it back to get it fixed. can anyone orient me here. thanks.