Hi Barry,
I installed Twonky 7 and everything works great (no thanks to WD and I had to spend 8Euros myself)!
Before when I would stream .mkv files from my MBL to my Samsung TV over LAN cable it would not wor k(never tried wireless streaming, for 10Gb .mkv files I would assume it gets too choppy). Now it does and I can finally use the MBL for what I bought it for…