Micah sent me a link to this rant about typographic “mistakes.” I think it more charitable and more accurate to think of these as short cuts or simplifications, since few people know how to generate the more precise typographic glyphs, and most people experience no confusion when reading text typeset in the way the blogger deems “wrong.” If a typographer committed these, I’d be willing to call them mistakes (granted that some of the points are debated).
More fun is the Rather Difficult Font Game, at which I got a score equal to Erik Spiekermann’s.