Irritating incorrect but much perpetuated literary references:~
That which annoys me most is, I think, the constant designation of the afternoon's entertainment attended by Alice in Wonderland as "The Mad Hatter's Tea Party".
a. The caps always used to name him would suggest that the Mad Hatter is the character's name; in fact, although described to Alice by the Cheshire Cat as being mad, he is only ever referred to by the author as the Hatter ~~ just as the other character so described, the March Hare, is not referred to as the Mad March Hare.
b. At the end of chapter 6, Alice decides, given the choice, to visit the March Hare rather than the Hatter, as she has seen Hatters before. So the party at which she arrives at the beginning of chapter 7 is not, I repeat, as so commonly but erroneously and irritatingly named, the Mad Hatter's Tea Party at all, but the March Hare's Tea Party. {The party's giver is not named in the title of the chapter, which is simply "A Mad Tea Party" ~ another fact frequently misapprehended and misquoted.}
I once raised this anomaly with my friend Nigel Rees, the well-known quotation maven, prolific author, presenter of BBC's "Quote-Unquote" and editor of the associated Newsletter. He suggested that the common mistake is due to the fact that the Hatter is by far the most talkative and prominent member of the party. That is true; but he is not, I nevertheless maintain, the occasion's host, and should not therefore IMO be so undeservedly thus credited.
Who has any similar literary annoyances to draw to our attention?