Over at The Daily WTF, there’s a great piece about debugging and 24×7 support for a weighbridge. Having dealt with my fair share of bugs (both figurative and literal), and having worked at a weighbridge for over a summer University vacation, I can appreciate this story of the challenges of 24×7 support doubly so.
It also has relevance to system and backup administrators – that being that no matter how simply you design systems, there’s always a chance you won’t think of every contingency. (Or you could think of it as: the best systems are those designed with 20×20 hindsight.)