I believe the Buffalo device uses Twonkymedia as its media server. You may need to add a profile for the Samsung (though I thought they would have included that on new releases by now). Check the TM forums for details.
i bought my UE40B8000XW at the end of last year in the UK.
i have just set up a networked drive (buffalo linkstation 500gb)
the TV can access the storage device and even plays vob and mpg fine but not avi (unfortunately nearly all my movies are in avi format)
i can play all supported formats via USb so i am thinking this is a problem or setting with DLNA can anyone enlighten me?
also, has anyone found the ultimate picture settings? i know this depends on what your TV is connected to and how (HD satellite receiver via HDMI) but i was wondering if there is anything i have to look out for?