Dark theme icons have been made user selectable from the preferences window. Changes applied to GIT repository.
Added light/dark theme compatible icon files.
Added optional lighter icons for darker user interface themes.
So I looked at the tls.c on the xiph.org's git server and it appears not to have been touched in the last two years which if it really does need updating is rather disappointing. Personally I would prefer them to do the work.
The error occurs on MP3 files that do not have a LAME tag. This bug is fixed in version 0.8.16. To use this later version I have detailed build instructions in the link. http://idjc.sourceforge.net/install_build.html
Late reply due to Sourceforge being down for days. The IDJC back end is crashing at the end of every audio track. It may only happen when you play mp3 files or maybe not. I can't help with Debian packages but if you are feeling up to the task I have a link to installation instructions for building IDJC from source. http://idjc.sourceforge.net/install_build.html
Revert "Moved functionality of avcodec_encoder.c into live_webm_encoder.c."
Fixed potential memory leak.