And slavish, which I always pronounced to rhyme with lavish. 
I had a co-worker not long ago who pronounced this word just exactly like you or I pronounce the word “check.” That’s right, she encouraged people to “get in the check.”
Yeah, I know.
After long consideration (I never had the nerve to actually approach her about it), it occurred to me that perhaps she had at somepoint run across the British spelling of “check” (cheque) and had wound up confusing it with another Anglophile term.
Best I could come up with.
My English teacher says BAY-null. I think both pronounciations are correct.
Just acquired a new one today. Not a word I’ve ever had the occasion to use much - but I’ve certainly seen the ads for Italian jeweler Bulgari, which I always assumed was pronounced bull-GARR-ee. Had a date today with a guy who used to work there; turns out it’s properly BULL-gree, with the middle syllable kinda swallowed.
Found out recently that both my boyfriend and I had been pronouncing it wrong. He said it was “wi(long i)zen’d” and I said it was “weezen’d”. and it’s wi(short i) zen’d.
Learn sumpthin new every day.
When I was kid, my dad used to try to make us laugh by adding goofy word changes to popular songs or by incorrectly pronouncing words in normal conversation. Of course, I was unaware that the words were not being said correctly! 
I was watching “Slim Goodbody” on PBS at the approximate age of nine when I learned–after arguing the point–that the word was, indeed, BUTTOCKS and not BYU-TOCKS. (I was much older before I learned the correct pronounciation of poignant–also my father’s fault entirely.)
While reading Charlotte’s Web out loud one day, I learned, much to my embarrassment, that Wilbur liked to lay in a manure pile (pronounced ma-NU-er rather than MAN-yer). Oy, was I a dumb kid!
I thought it was pronounced that way until I read your post! I just looked it up and listened to it on Mirriam-Webster’s site. Consider me newly educated on “victuals” pronunciation It is pronounced “vittles” for anyone who was ignorant like me. I thought that victuals and vittles were 2 different words and that they were synonyms. What a maroon!
Well, there you go. I always thought it was ban-uhl. But as you said, too late to change now.
Sheri
Someone has arrived.
Even m-w.com says that both are acceptable.
Again, http://www.m-w.com says either pronunciation is acceptable.
Ditto. It can also be on the first syllable, per the same site. What I love about the site is that they have sound files of pronunciations for most words – just click on the little speaker symbol on the word’s definition page.
A friend of mine once insisted that I had mispronounced detritus; he was positive it was pronounced DET-uh-riss, and made fun of my pronunciation. A quick trip to the dictionary turned the tables. FTR, I apparently have been mispronouncing segue incorrectly until now, and though I use epitome correctly in speech I’ve been mispronouncing it in my head when I read it!
“ariadne” - how do u pronounce that?
air-ee-AD-nee
Slight hijack.
Words I hate to hear mispronounced:
Mischievous
Espresso
Etcetera
Aluminum(Brits)
Anybody else?
I have a feeling that I’m opening Pandora’s box a little wider here, but I have to state a few along this same line. They are as follows:
Actual word----Pronunciation I hate
peripheral----per-if-re-uhl
nuclear----nuke-yu-ler
realty----re-luh-ty
jewelry----jew-ler-y
This last one is just where two actual words are confused.
Cav-al-ry–those soldiers on horses you see in all the Western movies
Cal-va-ry–The famed place of the Crucifixion
The list goes on, but I’ll stop here!
I was got scolded for “sill voose plate.” Dang, if they would only spell it like it sounds.
I was got scolded for “sill voose plate.” Dang, if they would only spell it like it sounds.
Ditto on whoever mentioned “segue”. Got corrected on that when a freshman in college.
Also: quiche. I knew there was a French food called quiche (I had seen the word written) and I knew that there was a cheesy, eggy, spinachy pie thing that my mom sometimes made called keish, but I think I was sixteen or seventeen when I realized that they were the same thing.
OOPS! I’ll have to add Bulgari to my list too!
How about Givenchy… I had no idea that Jee-von-shee was the same as the designer I called Ga-vin-chee!
Another: … heinous … (possibly already mentioned)
I pronounced it HEE-nee-uss, and didn’t learn the correct pronunciation (HAY-nuss) until watching Bill & Ted’s Excellent Adventure! <blush!>
victuals = vittles, who knew?
One word that I’ve never heard in conversation, but see frequently in books - halcyon. I read it, but my brain just refuses to make the connection - in my head it’ll always be pronounced “halykon”.
I too, always want to say ‘halykon’. I think it’s actually hal-sion, but I’m not even really sure. It’s a pity, becaues it would be a great word to throw into conversation when you were trying to be pretentious.
My strangest mispronounciation as a kid was the word luxury. I don’t think I had ever heard the world in conversation, but I fed my cat canned food labeled ‘luxury stew’. One day, I asked my Mom if I should give the cat some lurk-see stew. I have no idea how I got this, but it certainly amused my family.
Incidentally, jimpatro I don’t think you can call the British word ‘Aluminium’ a mispronounciation. It’s spelled differently and everything, and I think they had it first!