We've discussed here before, lo these years ago, the use by a noticable segment of the population of the term "dilemna" instead of "dilemma", but we've never addressed the process by which the second "m" in dilemma became an "n". My American Heritage dictionary contains a usage discussion, but doesn't even mention "dilemna", let alone explain how that mutation came about. So I am wondering about the whens, whys and hows of "dilemna." Could it be something as silly as a typographical error in some crucial work? A process of recognized language evolution (that seems unlikely; going from the easy-to-say to the more difficult is the opposite of the normal process)?

*heh* In my American Heritage, "dilemma" is listed between "dildo" and "diletante". Is that a dilemma? Or the opposite of one? Speaking of which, is there a term to describe a choice between favorable or attractive alternatives?