We’ve been seeing transient problems with images that appear to be corrupt, but only during display. The images themeselves are fine on disk. This problem seemed to reach a head this morning, where nearly 90% of images on the site displayed incorrectly, or didn’t display at all.
We tracked down and corrected the issue - images should be displaying correctly again now. If you’ve noticed the corrupt images today, don’t worry! Your images are OK. :) (Although please do keep in mind that this is a -beta-. We don’t expect anything catastrophic to happen, but don’t store anything yet that you would mind losing.)