It drives me up the wall when I read an article - especially one in a publication that has presumably been edited, and I see stuff like this, from an article on infection control and handwashing:
After pouring over infection control materials...
It's "poring" not "pouring"!
Another one that drives me crazy - and that I have to power to edit but haven't gotten around to yet - is this, in an article on using internet sources and critical reading:
Does it "pass the mustard" when it's read critically?
I'm pretty sure they meant either "pass muster" or "cut the mustard." I personally prefer the former.
Along those lines,
this was amusing.