The other day I was surfing the Wiktionary site, and wondered about their official pronunciation of their site:

So they don't pronounce it "vik-shuh-ner-ee" but "vik-shuhn-ree", omitting the "e". Digging further, in their pronunciation key of the word "dictionary", they list the "e" as optional. Yet all other dictionaries I found list "... shuh-ner-ee" as the only correct pronunciation. Is it correct to pronounce it without the "e"? And how common is that? Is it a difference between AE and BE? How would you pronounce it?