I uploaded some images this morning, and they didn't show up. I figured they just needed some time. I just checked them again, and now there's no trace of them - even the icon representing an image is gone! I uploaded 201x201px images, and went through the crop tool with them. Is this a new bug or the same old one being persnickety?
I got this bug too. It looks like the crop area has to be 200x200 pixels or smaller. If you expanded it to cover the entire 201x201 image, it won't compress properly to fit and the result is undisplayable. Recommend for the time being you upload a 200x200 image exactly, since that's now functioning as intended.