Just when it appears Android 2.2 is ready to leap from smartphones to tablets, Google steps up and casts aspersions on its mobile operating system -at least for now.

Hugo Barra, director of products for mobile at Google, reportedly told UK tech news site TechRadar that Android 2.0, code-named Froyo, "is not optimised" (British spelling) to run on tablets. In addition, the Android Market won't be available on Froyo tablets, a major shortcoming.

"If you want Android market on that platform, the apps just wouldn't run, [Froyo] is just not designed for that form factor," Barra told TechRadar. That's unsettling news, particularly for tablet enthusiasts preparing to buy Samsung's Galaxy Tab, an Android 2.2 tablet that starts shipping in Europe next month.

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