"Written by humans", yes.
I think it was archeologist Howard Carter that said it best: "Gaaacckkkk!! Arghhh!" back in 1939, seconds before he died.
Some have said he was merely reflecting on his former boss's last words, uttered years earlier, back in April 1923, just months after they'd opened King Tutankhamun's tomb. Others insist that Lord Carnarvon's actual last words were the more pithy, "Arghhhh! Gaaaacckkkk!!"
But who knows...programmers often can get the same result from two different sets of code, and love to claim that 'bugs' are simply features, or opportunities, while others think some features are 'bugs'.
As Lord Carnarvon discovered, living on the West Nile presents enough 'features' let alone bugs to last a lifetime . A shortened lifetime.
I think that as Win8 archeology proceeds, there will be enough curses for everyone to enjoy.
Some, for a lifetime.