I just got my MBP from applecare for the second time due to my right speaker not sounding the same as my left speaker. Does anyone else have this problem?? Is it something I am doing?? I've tried many songs and changed the balance and each speaker sounds noticably different, is this supposed to be the case? The work says they replaced everything audio related, but they didn't even bother to check if the problem was fixed?! Thanks for any input...