Scrub status: no stats available

Dear list,

I am running btrfs on Arch Linux ARM (Linux 3.14.2, Btrfs v3.14.1). I can run scrub w/o errors, but I never get stats from scrub status

What I get is
btrfs scrub status /pools/dataPool

scrub status for b5f082e2-2ce0-4f91-b54b-c2d26185a635
no stats available
total bytes scrubbed: 694.13GiB with 0 errors

Please mind the line "no stats available". Where can I start digging?

Thank you,
Wolfgang

Here:

legolas:~# l /var/lib/btrfs/
total 16
drwxr-xr-x 1 root root  494 May  6 04:08 ./
drwxr-xr-x 1 root root 1360 Apr 27 22:15 ../
srwxr-xr-x 1 root root    0 May  6 03:48 scrub.progress.4850ee22-bf32-4131-a841-02abdb4a5ba6=
-rw------- 1 root root  428 May  6 04:08 scrub.status.4850ee22-bf32-4131-a841-02abdb4a5ba6
-rw------- 1 root root  427 May  5 05:04 scrub.status.6afd4707-876c-46d6-9de2-21c4085b7bed
-rw------- 1 root root  418 Jan 11  2013 scrub.status.92584fa9-85cd-4df6-b182-d32198b76a0b
-rw------- 1 root root  420 May 17  2013 scrub.status.9f52c100-8c89-45b6-a005-3f5de1c12b38

Marc

"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901