Greg Cox wrote:
There was great bit on Big Bang Theory last season,when Amy got Star Wars and Star Trek mixed up.
"Star Trek," Penny corrected her. "Not Star Wars."
Amy: "What's the difference?"
Penny, coming clean: "There is NO difference!"
(Heck, I've been introduced as a "Star Wars author" more than once. Most of the time, I don't bother correcting people.)
More than once I've heard people refer to Spider-man as "Superman".