I almost started to cry last week when I had to explain the difference between Java and javascript to a recruiter that had found my resume online and called me. She couldn't make up her mind about what the client was looking for. I tried explaining they were vastly different technologies but I still don't think she got it though :(
One recruiter once sent me an email for a position in "the Nordic countries". At the time, I was looking into working in either Finland, Denmark or Sweden so I replied the guy I was interested.
He called me back straight away and when I have asked him in which city the position was, he replied "Brussels".
After my initial silence of disbelief, he went on explaining that he had to write "nordic countries" because Brits don't want to go to Brussels, but they consider Nordic countries more attractive because girls are supposedly hot.