I tried unetbootin and pendrive, and nothing helps. After i choose usb from boot menu error message (missing operating system) appears for a sec and continue to boot other system on hdd, in my case Windows 7. Do i have to wait final release or this can be fixed? Thanks.
closed as off topic by Jorge Castro, Mateo_, Eric Carvalho, Kevin Bowen, Thomas W. Apr 8 '13 at 7:04
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