I'm having problems with the media streamer app...it keeps freezing/crashing on me regularly.

Here's my setup;

• upnp server is a HP mv2010 NAS, upgraded to 2x500Gbs drives (mirrored) with Twonkymedia 4.4 installed. The music library currently contains about 2,500 FLAC encoded songs.
  
• upnp renderer (player) is a Denon 3808ci receiver.
  
• upnp control point is my Nokia 770 running media streamer
  
• the server and renderer are both attached to my network via ethernet

When the 770 behaves properly this is an amazing setup. Unfortunately, the application freezes or crashes constantly. I've tried everything I could think of : deleting and creating a 64mbs virtual memory on the MMC card, uninstalling all themes/unneeded apps, deleting all user files, un/re-installing media streamer...I'm out of ideas.

Appreciate any ideas/thoughts on how to get this working more reliably.