I've had the same problem a few times. No clue on what causes or how to fix. Lately I've gone back to loading photos from my pc instead of loading direct from my iPhone. I've found that even though my photos are crystal clear, once posting them direct from my iPhone on GJ, they look grainy. Doesn't happen when loading from my pc for some reason. I was also using Photobucket for a long time, but now I just use GJ's software and saves tons of steps and time! Plus, if Photobucket goes down, my photos don't disappear from the post.