This page tells you how to resolve problems in some applications if you receive strange/weird error messages or conditions.
GStreamer-ERROR **: No default scheduler name - do you have a registry ? aborting...
Failed to create the player: Couldn't initialize scheduler. Did you run gst-register?
The answer is to run the command gst-register-0.8 under your normal user account.
If you have installed both GStreamer 0.8 and 0.9, or have run gst-register-0.8 as both root and yourself, delete the configuration files created by GStreamer in root’s and your home directory, and re-run gst-register-0.8 (probably similar for 0.9) only as root and try to start Rhythmbox again.
tar: Failed open to read on /dev/nrst0 <No such file or directory>
find: paths must precede expression Usage: find [path...] [expression]
Your shell glob(s) matched files in the current path. Surround your expression with single or double quotes and it should work.