I am having this same issue, only on the Android application. It appears that somebody in the Google Play store is having the issue as well (in the comments). I am guessing this is a bug, where do we report such things (unless we just did). The pictures were just simply taken with my Galaxy S2 and attached to the note. They are showing fine on the site, and they showed up fine for weeks on the phone, but now I just get 2 broken images in the Android app. Frustrating since the images are of my membership cards, etc. (reducing wallet clutter).