This article on interview attire posted at the top of the forums page is funny:
http://www.studentdoctor.net/2010/09/interview-advice-what-to-wear-what-to-wear/
As soon as I saw this guys ugly tie I had no faith in any of his fashion tips. According to him, I should wear a navy, double breasted suit, loafers, and french cuffs
👎.
I've seen a couple of faux pas, so maybe this article is more useful than I think. A couple of little things I've seen were guys buttoning all of the buttons on their jacket (which looks especially weird with 3 button suits) and a guy not clipping his tie bar to his shirt (so it flapped around while he walked).
The bigger faux pas I've seen were a girl wearing hiking boots and a backpack (no suit either), a guy dressed like he was going sailing and wearing a very scuffed/dirty pair of shoes, and then a guy whose back was covered in dandruff like he rolled around in it before coming to the interview.
However, most people were dressed pretty sharp!