I had some problem with subtitles support in past and I decided to remove it. Author actually wrote somewhere that after removal of very first version of subtitle support it is needed to force reinstallation of gstream renderer package. I did it and checked that all remnants of subtitle support were deleted. So, I suggest you to run in root shell (X-Term) the following - apt-get install --reinstall mafw-gst-renderer AFTER upgrade to PR1.1.1