When I mount blank btrfs partition in Dolphin, I get "Permission denied" on write. You can see that it's mounted on /run/media/%username% dir which is correct, but owner is root.
[doctor@doctoror doctor]$ pwd
/run/media/doctor
[doctor@doctoror doctor]$ ls -l
total 4
dr-xr-xr-x 1 root root 0 січ 1 1970 Home
[doctor@doctoror doctor]$ mkdir Home/tmp
mkdir: cannot create directory ‘Home/tmp’: Permission denied
/etc/fstab
. – terdon♦ Sep 29 '13 at 12:25/proc/mounts
so people can see the mount options. – Mat Sep 29 '13 at 19:24