There was an email to the bug squad mailing list about this issue (https://lists.ubuntu.com/archives/ubuntu-bugsquad/2011-April/003176.html) which references a thread on the dm-crypt mailing list (http://dir.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt) where a couple of people have also lost their encrypted partitions.
There was an email to the bug squad mailing list about this issue (https:/ /lists. ubuntu. com/archives/ ubuntu- bugsquad/ 2011-April/ 003176. html) which references a thread on the dm-crypt mailing list (http:// dir.gmane. org/gmane. linux.kernel. device- mapper. dm-crypt) where a couple of people have also lost their encrypted partitions.