... (I circled it in magenta.) It didn't go away after I cleaned the lens, which means the dust is inside the camera. Folks on FriendFeed came to the same conclusion . This camera is long out of warranty and has no user-serviceable parts inside, so I'll have to get a new one. In the meantime, I've been using Photoshop Elements' spot healing brush , which does a decent job de-spotting the photos.