] KXAS-TV reported that ADVO, the company that printed the
] advertisement, said a graphic artist working on the flier had
] stepped away from his desk, and while he was gone a co-worker with
] the initials C.C. altered the banner's text. Neither the artist
] nor anyone else noticed the change, and the flier went to print.

Lesson One: Always, always lock your screen when you walk away from your computer at work..