Hi, I'm suffering the same issues. Files do play through USB but with DLNA the same file(s) just refuses to play or for some reason all of a sudden the "audio codec is not supported". Why doesn't Samsung create another firmware update where this is solved? Can't be so hard, right?
My TV already has the T-CHUCIPDEUC-3002.2 update firmware and the problems occur with both, AVI, MP4 and MKV files.