When using the DNS-321 with my PS3, if I select "All Videos" from the PS3 menu, I can play all movies fine. When I select "Folders" then browse to movies in my folder structure, some movies play only part way then stop. When I check the file size of these movies, they are MUCH smaller than they should be. Checking the file size when selecting "All Videos" from the PS3 main Video menu, looks right. I tried logging on the the DNS-321 and refreshing the UPnP server and power-cycling the PS3 & re-finding the media server, but still shows the funny file sizes. Any idea how to fix this? I'd like to be able to browse to movies by selecting folders, rather than scrolling through one big list.