Montecfo
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
This one drives my SIL nuts. She's from the Philly metro area, and was a French minor in college. There's a road between Lexington (where she lives) and Versailles. She'd be giving directions, or asking directions and was blown away with the ver-sales thing. After 20 or so years, she's gotten used to it but it still bugs her.
On the Mary, Merry, Marry front - I'd add Ferry and Fairy. I was, literally, taught those words as homonyms in elementary school, as examples of a homonym - along with Bare and Bear, and of course There, Their, and They're. This was in San Diego.
DH, from Philly, is in the camp of different pronunciations for Mary/Merry/Marry and Ferry/Fairie. It is usually only and issue when we are in the NW and need to take a Ferry and he starts mocking my pronunciation and I ask him if he wants to take the "furry" to Bainbridge (or where-ever) because his pronunciation is so weird.
Another regional thing is whether you stand 'in line' or 'online'.... To me, online is on the internet, in line is when you are in a queue. My friends from NYC and northern Jersey are firmly in the online camp.
People that say online need to pay attention and fall in line.
Never heard that one.