I hadn't realised this thread was here. - here is a copy of something that I have put on another thread:
Some Mothers Do 'Ave 'Em was one of the most culturally destructive programmes ever to be aired.
It was as a direct result of this programme that (what seems to be) a majority of the population of the United Kingdom lost the ability to pronounce the word harass correctly.
As has been said, the standard practice in English English is to put the stress on the first syllable of the morpheme, so words which start with an additional morpheme ( un- dis- etc) the stress is on the second syllable. I have been told that Italian usually stresses the second syllable and the significant Italian -originating population of New York is responsible for the American practice.
Incidentally, if you go to Birmingham and listen to the way Brummies pronounce the name of the suburb containing the Cadbury factory ... it does sound weird.