http://en.wikipedia.org/wiki/Murphy%27s_law
In short, when someone says that something will not go bad, it WILL go bad.
Murphy's the guy who breaks your printer when your assignment is due tomorrow, who stops buses when you are in time for an appointment, who cooks up your motherboard when you are backuping your most important work, who joins a forum to start a flame war when someone claims that there will not be one.

Alright, I'm going waaay too off-topic now. I'll go make sure Murphy does not join the discussion.