Ok, so since I have purchased my MBP the screen changes in brightness from time to time. Its been about a little over 7 weeks of ownership and I have noticed it for awhile but now it bothers me a little. I use my MBP 15 i7 4gb ram HD AG in class/school majority of the time. In class I use my MBP at about 1/2 brightness (compared to full) in this fixed setting I have had the brightness flicker between bright to slightly dull and back. I have not dropped my MBP nor any other sort of damage so thats out of the question. Wondering if this is common issue or not and what I should do? I think I will show it to a Genius but I do not know how I will show this as it only happens once in awhile.