(I haven't chimed-in here at bugs.debian before but I would like to help
out with this bug)
I tried workaround in message #15 and then made sure my echo
$XDG_RUNTIME_DIR variable was correctly set to /run/user/1000. I then
proceeded to open my editing programmes with gksu.
"gksu nautilus" resulted
It seems that, for me anyway, this problem may have been caused by an
incorrectly compiled Nvidia Proprietary Driver (which HAS to be used due to
my particular hardware). I haven't had any of these dconf permission errors
since recompiling.
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Pkg-system