CWmike writes "Google announced a new version of Android this week with some impressive new features, but it's unclear if it's done enough to solve a problem that has dogged its mobile OS: fragmentation. Even as it announced the imminent launch of Android 4.1, or Jelly Bean, the majority of users are still running Gingerbread, which is three major releases behind. According to Google's own figures, just 7 percent are running the current version, Ice Cream Sandwich, which launched last October. That means apps that tap into the latest innovations in the OS aren't available to most Android users. It also means developers, the lifeblood of the platform, are forced to test their apps across multiple devices and multiple versions of the OS. So when Google's Hugo Barra announced a Platform Developer Kit during the opening keynote at I/O this week, the news was greeted with applause. The PDK will provide Android phone makers with a preview version of upcoming Android releases, making it easier for them to get the latest software in their new phones. But is the PDK enough to secure for developers the single user experience for big numbers of Android users that developers crave? In a 'fireside chat' with the Android team, the packed house of developers had more questions about OS fragmentation than Google had answers."