I observe random crashes when streaming to my Onkyo TR-509, either by DLNA (PCM) or by http. I usually hear music from Grooveshark (flash based), interestingly when a crash occurs, the music stops here too. However, the crashes also occur when listening to youtube videos.
When swyh crashes, no error message shows up. The music just stops, and the only possibility to recover is to restart swyh. The problem shows up, about every 30 min.