As for resume format, it is an open source job and my main machines are all MS-free, so it is extra trouble (especially if it is docx). Just a preference, that's all. I didn't advertise otherwise.
Tip for maintaining multiple formats: asciidoc/markdown = text you can generate html with. And once you have html you can print to pdf from a browser. 3 formats for the price of one.
Bear in mind I wasn't trying to write a list that's canon -- just what I like to see. I'm not going to chuck applications simply because they missed a point in that list of recommendations.