[aztech]

I'm on RC3 and today I wanted to upgrade a few packages, but it fails on btrf snapshoot.

Terminal

root@xbian:/etc# cat /etc/xbian_version
1.0RC3
root@xbian:/etc# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
xbian-package-config-shell xbian-package-initramfs-tools xbian-package-xbmc xbian-update
4 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/30.6 MB of archives.
After this operation, 479 kB disk space will be freed.
Do you want to continue [Y/n]? y
/usr/sbin/btrfs-auto-snapshot: line 456: 100 - (mdu*100 / mdt) : division by 0 (error token is ") ")
Error: root is not existing volume.
/usr/sbin/btrfs-auto-snapshot: line 1: 2434 Segmentation fault exit 138
E: Problem executing scripts DPkg::Pre-Invoke '[ ! -e /etc/default/xbian-snap ] || . /etc/default/xbian-snap; [ $ENABLEDAPT = yes ] || exit 0; z=$(findmnt -n /| awk '{print $2}'); z=${z#*\[\/}; export z=${z%%\/*}; if [ -x /usr/sbin/btrfs-auto-snapshot ]; then bt rfs-auto-snapshot snapshot -k $KEEPAPT -l apt-run $z ; fi ;'
E: Sub-process returned an error code
root@xbian:/etc#

Setup is running on a model B.