So the new dll is the right one now and I can confirm that 1080p audio isn't working for me either.. But I notice something else strange. If I run the 720p (23) file, I get the usual experience. Buffers upto 2% then launches the video all within a few seconds. If I launch the files with a higher number (132/136 maybe?) it buffers something very slowly upto 100% (takes like 90 secs on 80mb fibre optic connection) and then buffers up again a second time before starting the video??