I currently have the Plex app loaded on my Co-star, but am not real happy with the rewind and fast-forward when watching movies through DLNA. It is almost unusable. I guess I'm spoiled by the way my PS3 handles that functionality. Is the GTVBox app any better? Any other app work better? And why doesn't the built in Playpoint app work with mkv/h.264. None of my videos will play through it, yet the specs say it supports those formats. ???