It seems that landing sound was being done in another method after applying falling damage. This one is fixed, I haven't updated SVN repository yet, I'm having problems while trying to connect, so I'll try doing it later <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->.

When player is dead and dead body slides from a cliff down, landing sound ("ugh!") is still played as if he was alive. Happened in Strife so far, not sure about other games.