I had to uninstall the extra package because it made the media player slower while playing music. If I played music with this package installed and the n900 blocked, pressing the power button (to show the unlock screen) would halt the music for a few seconds. This happened even afer rebooting the device and even when I unchecked the show subtitles option in the applet. The process mafw-gst-subtitles-... is always running even when not playing videos.