Dropbox's Carousel app handles the photos you've taken on your smartphone and automatically backed up to the company's servers. The experience is a smooth way to save your images somewhere while retaining quick access to them. But if you want to use the interface to view a photo immediately after taking one (instead of using your phone's built-in gallery app), you previously had to jump out of the camera and hop over to the separate app.
With the latest version of Carousel, an icon pops up in the corner of the screen that speeds up the process. You can drag this little image around as you would a Facebook chat head.
The little bubble appears as soon as you take a picture, likely the result of Carousel monitoring your camera folder. If you don't like the addition, you can simply uncheck the option during setup or turn it off in the app's settings.