Well, I only had the Alocasia by the window for about a week. I had been taking it outside during the day hours as we had about a week of temperatures into the 70's and even low 80's. Other than that it has been in my grow room for the entire winter and is back there now. I agree that it appears as if the leaves are being damaged somehow while still inside the stalk. In fact, I had one pop up about a month or so ago that didn't even have a leaf. Is it possible I over fertilized?