Thanks Slartibartfast and CarrieM for the replies. It doesn't appear the images were deleted as some of the photos I'm referring to are ones I added. The two most recent threads I have noticed this in are "Shave Den-Again" in the brushes forum, some photos are still there while others are not, and I also noticed it in the thread, "Waterville, Better Than Expected" in the Gallery Show & Tell forum.