dkhns,

I'm not sure about every region, but FF> REW<< and Pause are not supported with DLNA, and in the U.S. models, this is stated i the manual.

Subtitles have to be part of the container, and this may require encoding the file.

If you'd like to check on an upgrade, I'd recommend contacting the Samsung customer service center in your region.

Best,

--HDTech