The one flaw
When someone tells you, "His one flaw is using the wavy underscore to signal 'set ital,' " you know she's a copy editor.
(No, not my quote.)
I do have to wonder sometimes if copy editors just have a different set of standards... or live in an alternate reality.
Overheard exchange between twentysomethings today in the office:
G: What's Arsenic and Old Lace?
M: I Googled it. It's an old movie.