Can you please check if you have the same issue as described in Bug #22501 That seems likely. Also, please provide a debug backtrace, and error messages if any.
Please try to test this using the Dapper Beta packages. Thanks for reporting this. ** Changed in: serpentine (Ubuntu) Status: Unconfirmed => Needs Info -- "Cannot Convert Files" (mp3) that Totem-gstreamer can play https://launchpad.net/bugs/37148 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs