Heard over northern Florida last night:

Jacksonville Center:
"Airliner XYZ: Turn left, heading 320."

Airliner XYZ:
"Is that a 320 heading for Airliner XYZ?"

Jacksonville Center:
"No, that should be, 'Turn left, heading 230' for Airliner XYZ. Sorry about that. Five out of four controllers are dyslexic."

Airliner XYZ:
"No problem. Five out of three pilots, same thing. Airliner XYZ turning left, heading 230."

Tom Ahonen
via e-mail