Topic: Unfortunate typo
I'd penned a somewhat stern e-mail to a couple of people at a client company. They'd been very slow in returning communication regarding a couple of candidates (I have a condition in the contract that clients are to respond in two business days or less if they wish to interview or not) and just a few housekeeping issues I think will help us work together - the tone was polite but firm.
In my closing I made a mistake that could have been misconstrued:
"Retards,
Mike"