Got my media server set up (MediaTomb on Ubuntu Linux) and was trying it out last night. There seems to be a limited number of codecs installed on the HDR as it was only able to decode about half the files. The rest it just said "Unable to support this format". Judging by the time it takes before giving up it does appear to be looking in the files rather than just relying on the file extension. Trying to narrow it down is a bit tricky as the file extensions are somewhat generic - .AVI covers a mass of different encodings for example. Surprisingly though, it couldn't play any MPEG file which I thought rather odd as, AFAIK, Freeview transmissions are MPEG. Is there a detailed list anywhere of what it does support and is it likely that Humax will add to this list with s/w upgrades?