bigdog

Yeah, sounds like what I experienced last year, at least similar. The center leaf may appear to be healthy when in fact it is not. Occasionally, there will be a rotten spot below the spot that looks healthy. This will cause the growing point to either rot further on down the pseudostem, or to bust out of the side (mine rotted all the way down to the corm). I'd give it a few days, and if you don't see any action, start cutting down a few inches at a time. Looking at your pic again, I do see a small black spot in the very center. Could get bigger as you go down.