Max Kanat-Alexander posted an article called "How Not To Get Hired.". Since I'm in the end stages of finishing my book on geek hiring, I was hoping there would be swell interview horror stories. The first bullet talks about not following instructions in a job ad, but the rest is really a laundry list of Perl practices that nobody should be doing any more, and a few more on what we should be doing, starting with using Moose.
I'm sure there'll be some crabs out there who say "Aw, that's just all common sense," but common sense rarely is. It's well worth a read.