Note sure if it's the same bug, but running 14.04.

# cat /etc/os-release 
NAME="Ubuntu"
VERSION="14.04, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"


# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/kubuntu--vg-root /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=3c4f0566-cf7a-4d7a-b710-2da7f27d202e /boot           ext2    defaults        0       2
/dev/mapper/kubuntu--vg-swap_1 none            swap    sw              0       0

# Synology NFS Mounts
w.x.y.z:/volume1/video /media/nfs/video nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
w.x.y.z:/volume1/Backups /media/nfs/backups nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
w.x.y.z:/volume1/Documents /media/nfs/documents nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
w.x.y.z:/volume1/Music /media/nfs/music nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
w.x.y.z:/volume1/Downloads /media/nfs/downloads nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
w.x.y.z:/volume1/VMachines /media/nfs/VMachines nfs rsize=8192,wsize=8192,timeo=14,intr 0 0
//w.x.y.z/video /media/cifs/video cifs user,uid=1000,rw,suid,username=ian,password=Maxp0wer1 0 0
//v.w.x.y/pi /media/cifs/pi cifs user,uid=1000,rw,suid,username=pi,password=raspberry 0 0


# cat /etc/mtab
/dev/mapper/kubuntu--vg-root / ext4 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/cgroup tmpfs rw 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
udev /dev devtmpfs rw,mode=0755 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
tmpfs /run tmpfs rw,noexec,nosuid,size=10%,mode=0755 0 0
none /run/lock tmpfs rw,noexec,nosuid,nodev,size=5242880 0 0
none /run/shm tmpfs rw,nosuid,nodev 0 0
none /run/user tmpfs rw,noexec,nosuid,nodev,size=104857600,mode=0755 0 0
none /sys/fs/pstore pstore rw 0 0
/dev/sda1 /boot ext2 rw 0 0
rpc_pipefs /run/rpc_pipefs rpc_pipefs rw 0 0
systemd /sys/fs/cgroup/systemd cgroup rw,noexec,nosuid,nodev,none,name=systemd 0 0
//v.w.x.y/pi /media/cifs/pi cifs rw,noexec,nodev,uid=1000,username=pi,password=raspberry 0 0
//w.x.y.z/video /media/cifs/video cifs rw,noexec,nodev,uid=1000,username=ian,password=Maxp0wer1 0 0
w.x.y.z:/volume1/Music /media/nfs/music nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0
w.x.y.z:/volume1/VMachines /media/nfs/VMachines nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0
w.x.y.z:/volume1/video /media/nfs/video nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Downloads /media/nfs/downloads nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Backups /media/nfs/backups nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Documents /media/nfs/documents nfs rw,rsize=8192,wsize=8192,timeo=14,intr,addr=w.x.y.z 0 0



# cat /proc/mounts
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,relatime,size=16439060k,nr_inodes=4109765,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=3290808k,mode=755 0 0
/dev/mapper/kubuntu--vg-root / ext4 rw,relatime,errors=remount-ro,data=ordered 0 0
none /sys/fs/cgroup tmpfs rw,relatime,size=4k,mode=755 0 0
none /sys/fs/fuse/connections fusectl rw,relatime 0 0
none /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
none /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
none /run/shm tmpfs rw,nosuid,nodev,relatime 0 0
none /run/user tmpfs rw,nosuid,nodev,noexec,relatime,size=102400k,mode=755 0 0
none /sys/fs/pstore pstore rw,relatime 0 0
/dev/sda1 /boot ext2 rw,relatime 0 0
rpc_pipefs /run/rpc_pipefs rpc_pipefs rw,relatime 0 0
systemd /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,name=systemd 0 0
//v.w.x.y/pi /media/cifs/pi cifs rw,nodev,noexec,relatime,vers=1.0,cache=strict,username=pi,domain=WORKGROUP,uid=1000,forceuid,gid=0,noforcegid,addr=v.w.x.y,unix,posixpaths,serverino,acl,rsize=1048576,wsize=65536,actimeo=1 0 0
//w.x.y.z/video /media/cifs/video cifs rw,nodev,noexec,relatime,vers=1.0,cache=strict,username=ian,domain=MEDIACENTRAL,uid=1000,forceuid,gid=0,noforcegid,addr=w.x.y.z,unix,posixpaths,serverino,acl,rsize=1048576,wsize=1048576,actimeo=1 0 0
w.x.y.z:/volume1/Music /media/nfs/music nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0
w.x.y.z:/volume1/VMachines /media/nfs/VMachines nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0
w.x.y.z:/volume1/video /media/nfs/video nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Downloads /media/nfs/downloads nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Backups /media/nfs/backups nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0
w.x.y.z:/volume1/Documents /media/nfs/documents nfs rw,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,hard,proto=tcp,timeo=14,retrans=2,sec=sys,mountaddr=w.x.y.z,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=w.x.y.z 0 0

# df
Filesystem                    1K-blocks       Used  Available Use% Mounted on
/dev/mapper/kubuntu--vg-root   82010824    4781968   73039880   7% /
none                                  4          0          4   0% /sys/fs/cgroup
udev                           16439060          4   16439056   1% /dev
tmpfs                           3290808       1164    3289644   1% /run
none                               5120          0       5120   0% /run/lock
none                           16454028      29456   16424572   1% /run/shm
none                             102400         20     102380   1% /run/user
/dev/sda1                        240972      44489     184042  20% /boot
//v.w.x.y/pi            206424760  105944020   89996260  55% /media/cifs/pi
//v.w.x.y/video        8638846676 4374545720 4262947384  51% /media/cifs/video
w.x.y.z:/volume1/Music 8638846680 4374545720 4262947384  51% /media/nfs/music