I have built several new machines over the weekend using the 64 bit version of Ubuntu 13.04. I built them with LVM and home directory encryption. All of them pause before the login screen because they are trying to find /dev/mapper/this--vg-swap_1. The "this" designation I am familiar with only as it relates to the live CD. I was able to get rid of this error by commenting out the appropriate line in /etc/fstab which made the reference.
Why is it there and why are all these systems unable to find the referent?
(I used the standard live CD installed onto a thumbdrive running YUMI to effect all of the installations. About half were run from the live CD and installed from that deskop and about half were simply installed directly from the installer.)