I don't get the theme change causing crash bug on the latest build kdenlive: commit 5103ea6fb6fba9fac3451d93019f3fcb86f638e8 Date: Wed Dec 23 23:26:18 2015 +0100 Kdenlive started up from startup script written by the build script https://community.kde.org/File:Build-kdenlive_v26b.sh.zip