No Previews in Ubuntu 12.10 [closed]

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http://askubuntu.com – Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I have downloaded and installed Ubuntu 12.10 from http://cdimage.ubuntu.com/daily-live/current/ . I cannot see and Untiy Previews in the Dash However. When I Right Click on a song, or any other files/app for that matter, it opens up the files instead of showing previews. Could you please help me out because I really want previews and is one of the main reasons I installed Ubuntu 12.10. P.S. I Installed Ubuntu 12.10 a while back (about a month ago) and made sure I did every Update. (HowTos)