My PB 12" will not charge over 67%. It cannot calculate the time remaining either. It does get plugged in a lot but also gets the battery ran down to <10% quite often. It can charge for 12 hours and it still will not get above 67%. I am not sure if it is just a software glitch or what I should do to try to reset it. The little bugger has to go back to apple for two other issues (trackpad button, no rubber feet remaining) maybe I just have to tack on a third. I do like the machine and do not abuse it either. Any ideas?