I wasn't sure what the problem was for a long time. I noted the possibly inaccurate use of "It" - which is redundant in the sentence. A better way to write the sentence would be, "The night was dark and stormy." That seems like a small quibble and it wasn't until I read the Wikipedia entry, that I learned more about the problems with the sentence. The full sentence, of which 'It was a dark and stormy night" is only a fragment, can be found there. It doesn't seem like a terrible sentence to me, although it is a little long and meandering.
I must admit to feeling nervous writing about critiques of English grammar and such. I hope my blog isn't too closely examined. How pretentious I would seem, were most of the errors from the contest to be found here!
Anyway, the entries are all amusing and this year one comes from Korea.
Billy Bob gushed like a broken water main about his new love: "She's got long, beautiful, drain-clogging hair, more curves than an under-the-sink water trap, and she moves with the ease of a motorized toilet snake through a four-inch sewer line, but what she sees in me, a simple plumber, I'll never know."
Glenn Lawrie Chung-buk, South Korea