Attention grammarians

Oxford University Press (OUP), publishers of a slew of dictionaries, recently identified the most common error in the English language. It's not the grocer's apostrophe and it's not confusing "its" with "it's" (an error now only committed by about eight percent of English speakers). No, the most common error in the English language is confusion or misuse of the words "diffuse" (meaning "not concentrated") and "defuse" ("to remove the fuse from or otherwise make less potent or harmful"). My guess would have been confusing "your" and "you're", but that didn't even make the shortlist. Other common confusions listed by OUP include rein/reign, pedal/peddle, tow/toe, pouring/poring, draw/drawer and their/there/they're.