If there was another application using the sound system, e.g. firefox, then mplayer would not produce any sound. If I paused mplayer, watched something, say on youtube.com, and then restarted mplayer, mplayer would crash.
There is a fix. That is to add this line to ~/.mplayer/config:
Så er der nyt blad med Resizing Graphics Files, Revisited Repo Review: Midori Grisbi Revisited, Part Three: Importing Other File Formats Inkscape Tutorial: More Text Tricks