Since installing Mavericks, I have noticed that Messages is not displaying images sent by other people. (It will display images that have been sent by me.) I have attached a screenshot. (Message was received before Mavericks was installed.) Double clicking on the filename creates a "Quick Look" popup that is very slow to load. If I click the magnifying glass instead, OSX will create a new file in my Downloads folder, and take me there. This isn't the worst thing in the world, but I would rather see the images inside the conversation again.