Sara Heffernen's "Graphic Design Pun Cards" make gentle sport of designers' compulsive, perfectionist tendencies, while being dad-jokey enough to elicit groans from the rest of us.
Having said that, "Bad Kerning Can Never Be Justified" is legit funny and two levels beyond what this kind of humor usually is, and "Keming" isn't far behind, even if it does kind of tell the same joke. The others are more of a spectrum; either you're grinding your teeth in response to the no-no's on display, or at the low-hanging punnery.
You can find the entire collection here. Sara should consider a line of T-shirts, and maybe opening a typographer's version of Spencer's Gifts to sell them in.
Via Design Taxi.