Hi irishwill2008,
I have also seen this. But in most cases is caused by MPD not being fully initialised. The PHP script rune_SY_wrk runs through its loop again and usually after 2/3 attempts, when MPD is fully initialised, the pipe is opened successfully. For rune_PL_wrk it’s the same story.
MPD is also shut down for several reasons (e.g. when you use Spotify), again during the start-up phase after a shut-down these 'Broken pipe' messages can occur.
janui