I have a Mybook World Edition White Light, connected to a PS3. I`ve recently upgraded the twonky to version 6.0.38, hoping to get mkv and external subtitles support. However, that`s not the case. The PS3 sees the mkv files, but says it`s an unsupported format, and no subtitles whatsoever when I play an avi, even if the avi and subtitles (srt) files have the same name. Without these features twonky is pretty useless to me. Any thoughts? Any other media server that can do what I want and can be installed on Mybook? It would be great if I could install PS3 Media server on mybook, that works like a charm streaming from my mac to PS3.