Packages: gstreamer010-fluendo-mpegmux-0.10.2-0.pm.3 gstreamer010-schroedinger-0.6.1-0.pm.1 libschroedinger0_1-0.6.1-0.pm.1 are installing files in /opt/gnome/. Since in 10.3 gnome isn't anymore in /opt/ looks like a bug (I haven't tried if the plugins are detected by gstreamer).