Hi guys. So I have noticed this since purchase of my MBP (Feb 2011) and it annoyed me so I want a solution. This doesn't always happen. Only sometimes. What it does is that when I plug my headphone, I mean any headphone, it wont recognize it so it plays through the speakers. This doesnt get fixed until restarting the MBP (which is really annoying). I had times where it didnt recognize my speakers, or it thought it had headphones in. After I unplugged my headphone, the red laser in the output was still on and thought it still had my headphone in. Again, I had to restart my mac. I tried system preference but the computer thinks it has headphones in or it thinks it doesnt have anything in so it didn't really matter. Couldn't change anything. Again, it only happens like 5 times a month. I dont know why it does that but its annoying to restart a computer everytime when it can't recognize the I/O. I never really had a microphone plugged in (since it already has internal one) so I dont know if it does the same thing like my headphones. Does anyone have similar problems? Is there a solution? Can it be a defect or these things where Apple can't get it to fixed?