Maybe a warning (your suggestion) that gThumb does work on the selected area (point) should do the trick. Then it is clear for the user that the problem is the material on the photo it self on not the gThumb program. Maybe in the future there will be a better algorythm...
-- gThumb red eye reduction does not work https://launchpad.net/bugs/85780 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs