When I enable the UPnP AV Server and share my Photo, Music & Video directories on the DNS-320 my Samsung UN46B8000XF Television can't use the .jpg photos (I get "Not supported file format") or even see the music files (.mp3). It does play my videos (.mpg, .mpeg & .wmv) correctly.
Based on the posts here, I copied my Photo, Music & Video directories to a Ubuntu box and threw mini DLNA on it. I also downloaded a trial version of TWONKY. With either minidlna or TWONKY the B8000 saw the pictures & even ran a slide show, it also saw & played my music and videos.
Can your DNS-320 serve pictures and/or music to a Samsung TV?
DNS-320, H/W Ver.: A1, F/W Ver.: 2.00 (dtd.: 12/17/2010)
Qty. 2 Seagate ST31500341AS 1.5TB SATA Hard Drives, configured RAID 1