И это всё МОЁ
Сабж. Во всём, оказывается, виноват Emacs.
Emacs has no support for ImageMagick 7. Other distributions have attempted to patch Emacs to support it and have ended up reverting to ImageMagick 6 due to instability.As long as ImageMagick 6 is still getting upstream support I don't see an issue with sticking with it. We know it works.