I have just uploaded a new version of the GIMP AppImage, with BABL/GEGL/GIMP/GMIC/PhotoFlow all updated to their current git versions. As usual, the latest appimage can be downloaded from here.
Please let me know if you encounter any new issues with this new version.
Known problems:
- missing printers in Fedora 24 (under investigation)
- warning message when starting the appimage from the applications menu (again under investigation, the warning is annoying but harmless)
- does not run on some Debian Jessie systems