Situation:
Using gstreamer with gnomevfssrc in a simple pipeline (gnomevfssrc ! mad !
osssink ) inside a Gtk2 app. Platform is RedHat's "Limbo" beta release,
which includes Gnome2 and is built with gcc 3.1. Gcc 3.1 complains a lot
about -I/usr/include.

Reading the docs, toggling the pipeline from from _PLAYING to
_READY to _PLAYING seems like it should rewind the pipeline and start
playing again. However, gstreamer segfaults on _READY.

This does not happen with filesrc.

A similar thing happens with Monkey-Media (rhythmbox/monkey-sound), which
uses gstreamer and gnomevfssrc. 

This code ...

monkey_media_mixer_set_state (mixer, MONKEY_MEDIA_MIXER_STATE_STOPPED);

... segfaults. Presumably, it's setting the pipeline in gstreamer to _READY.