I converted a bunch of DD+ discs to BD-R (but I used eac3to to demux and TSMuxer to mux) and I also get problems with most of the players I have. My PS3 just freezes up before it plays even a frame of audio/video. My Oppo BDP-80 will play them fine (except Transformers which looks all blocky for some reason, maybe because it's an AVC disc), but the HDMI audio has to be set to LPCM, otherwise all I get is static for audio. My Popcorn Hour (via USB HDD or external BD burner) plays them fine, although sometimes I have to pause and unpause to get the bitstreamed DD+ decoded properly by my Onkyo 805, otherwise it's just static. My Panasonic Blu-ray recorder (from Japan) doesn't seem to have any problems with the few discs I've tried, even when bitstreaming DD+. The Panny is a fairly new model, so maybe one of their newer BD players will have better luck than your Pioneer. Also try setting HDMI audio output to LPCM if you haven't already.