This version primarily adds compatibility for the latest Live web interface. It also adds a couple of features, namely Game totals for the Achievement list, and improved image caching (previously, thumbnails would occasionally refuse to load).
PLEASE NOTE that depending on your provider, it may take a while until you can actually download it. Because the Market app occasionally caches old APK’s, make sure that you install the latest version (4.16) – if it happens to install an older version, uninstall, clear your Market cache, then reinstall.
Thanks for your patience.