cryptsetup fails to determine root device from /etc/fstab

As the title states, when cryptsetup is called, it fails to determine the root device from /etc/fstab

CONTENTS OF /ETC/FSTAB:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' 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>
proc /proc proc nodev,noexec,nosuid 0 0
/dev/sda1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=e5d7df89-2ca9-4c25-8b68-b08eb5f455a0 none swap sw 0 0

occured on: 12.10 after running update-initramfs -k all - u
ran five times, and the same message appeared.

Description: Ubuntu 12.10
Release: 12.10

cryptsetup:
  Installed: 2:1.4.3-2ubuntu1
  Candidate: 2:1.4.3-2ubuntu1
  Version table:
 *** 2:1.4.3-2ubuntu1 0
        500 http://ca.archive.ubuntu.com/ubuntu/ quantal/main i386 Packages
        100 /var/lib/dpkg/status

TECHNICAL ERROR: cryptsetup: WARNING: cannot determine root device from /etc/fstab