Comment 15 for bug 192735

i should mention that:
installing paprefs and selecting "enable network access to local sound devices" and "don't require authentication" is the user specific equivalent to:
load-module module-native-protocol-tcp auth-anonymous=1
which is system wide
The user specific solution is probably a much better solution for users as it means you dont have to edit system config files

but the bug seems to really be with mpd. perhaps selecting a different output like esd is best at the moment.