I have an active Connection to my WiFi and a DLNA capable media player. Playing Video seems to work just fine but when I tap the Music entry in the main menu the application crashes back to the Start Screen/App List. This varies between showing the list of artists for about a second to crashing almost instantly. I have very few songs on the device right now (probably around 20-30) and a mix between Zune Pass DRM content and MP3 content.
Device: Lumia 900
OS Version: 7.10.8112.7
Play To Version: 220.127.116.11 (From Marketplace)