This was posted by dRoidessX in the "Tech" section but I'm wondering if it might get more response/help/answers in the general discussions? I'm having this same issue - whether scrolling slowly or "flicking" the pictures to get to the end - it gets to the same spot, goes black, then back to the screen that lists the camera roll, folders, videos, etc. It happens in both the "Camera Roll" and the "All Photos" groups.
Cannot Scroll to bottom of Picture Gallery
This happens when i am viewing pictures in the gallery, or trying to send a picture from the bottom of the gallery. So i cannot see any of my recent pictures.. It will get about two rows away from the end and go back to the previous screen.