bigdog

I've seen that before on Ensetes. I think that it is a type of fungus, possibly from the potting soil you used. I would take it out of that soil and completely defoliate it (as painful as that may be). Mix up a fungicide solution and soak the entire plant and corm (the fungus is probably living in the corm) in it for a while (how long depends on what type of fungicide). Get a new, sterile pot and some new, sterile potting mix and pot it up. I would have some extra fungicide mixed up in a spray bottle to spray it once a week for a few weeks after that, just to make sure you got it all. Also, I notice some organic matter collecting on the leaves and in the pot. Not good! That may not be the cause, but it certainly isn't helping.

Hope that cures it! It's a nice-looking little Ensete superbum otherwise.