<p>During Blu-Ray playback, the media (video, audio etc.) characteristics may change dynamically. Sometimes (eg. when not using LAV codecs) this requires rebuilding the DirectShow playback graph. When this happens, BDReader triggers the rebuild via a call-back to the MediaPortal managed player. The player notifies BDReader once the rebuild is completed. Currently an unhandled exception is thrown in the call-back. The exception occurs because the player tries to access the BDReader object from outside the thread in which it was instanced. In short: playback stalls.</p>