Is itinery/itinary an acceptable pronunciation of "itinerary"?
Solution 1:
/aɪˈtɪnərəri/ seems to be the correct pronunciation, but have a listen: http://www.forvo.com/word/itinerary/
at least two of them do /aɪˈtɪnəri/
My personal opinion is to pronounce words the way the majority of respectable dictionaries and, for example news readers, would pronounce them. If I have been convinced that my pronunciation is incorrect (I try to speak and write British English) I will change it regardless of what a minority (or even a majority) would use.