Fullscreen mode now constrains full-size images to the viewport. Optional Kiosk mode (on for this page) launches fullscreen view in browser kiosk mode. When in fullscreen mode, arrow keys can be used to navigate fullsize images. Escape key restores screen size.
Toolbar now has icon to hide/show the caption. Thumbnails drag now ends with a bouncy flourish. Numerous other tweaks and enhancements.