So we're working on a few initial apps for a hackercamp and finetuning the OS. We've been coding for like 17-18 hours trying to finish this off without a day 1 patch on the event itself, when someone starts swearing like a sailor. We walk past him take a look at his code and see that he's started an array at 3 instead of 0. He's one of the more experienced members on the team so this is a lack of sleep bug rather than a not knowing. To this day whenever someone makes an array error in their code someone always shouts "Arrays start at 3 right"!

Maybe not the most satisfying bugs but man is it funny as hell.