Thought I would join in this topic as a Brit living in CA for 14 years. This is my second post here so I hope I don't rattle too many cages;
burglarized - this word bugs the crap out of me for some unfathomable reason. The word, my dears, is burgled.
anesthesiologist - another case of the yanks taking a word and making it unnecessarily longer. Try anaesthetist.
solder - not the term, but the pronunciation. Every US person I have encountered pronounces it as "sodder". There is an "l" in that word, and it is not silent.
herbs - pronounced as "erbs" by Americans. Is this some sort of misguided belief the word is French, and trying to pronounce it with a little French flair?
oregano - we all probably know about that one
And why is it so many wait staff in restaurants fail to understand me when I ask for water (as in war-ter, rather than wah-der). Is it really that big of a leap to make the connection?
Well, that is my short list of bugbears. My list of things I love about the US, and CA in particular, is far too long to list here. Have a nice day everyone.