The Dilemma Dilemna

Who knew? When working on my latest blog, I discovered something quite incredible. All of these years I've been inserting a fantom "n" into the word "dilemma." I swear that's what I was taught. And it seems I'm not alone. So here's my dilemna, with an "n," thank you. What were you taught in school? Is this a 60s phenomenon? East Coast? Regional? Generational? What gives? I realize the Greek origins of the word have no added "n" but I swear somewhere out there a text book or two had a generation of kids misspelling their hearts out.

Here's an interesting article about this curiosity

http://www.grammarphobia.com/blog/2008/02/dilemma-inside-enigma.html