Embedded subtitles are not detected

The version of handbrake in the Ubuntu archives does not detect embedded subtitles. As a consequence, the options in the "Subtitle list" tab are always empty. Even, when clicking "Add" the option radio button for embedded subtitles is grey out and only the option to add srt files is available. I tried with sevaral video files with different video encondings.

This does *not* happen with the handbrake supplied by the handbrake ppa (https://launchpad.net/~stebbins/+archive/ubuntu/handbrake-releases). Although the same version, the ppa version works as expected.

Regards,

C.

$ lsb_release -rd
Description: Ubuntu 15.10
Release: 15.10

--
Ubuntu version:
$ apt-cache policy handbrake
handbrake:
  Installed: (none)
  Candidate: 0.10.2+ds1-1build1
  Version table:
     0.10.2+ds1-1build1 0
        500 http://be.archive.ubuntu.com/ubuntu/ wily/universe amd64 Packages

ppa version:
$ apt-cache policy handbrake-gtk
handbrake-gtk:
  Installed: 0.10.2-zhb-1ppa1~wily1
  Candidate: 0.10.2-zhb-1ppa1~wily1
  Version table:
 *** 0.10.2-zhb-1ppa1~wily1 0
        500 http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status