LUKS type passphrase twice

[Bruno Wolff III]

On Wed, Oct 26, 2011 at 10:09:05 +0100,
  Jeronimo <jeronimocalvop at hush.com> wrote:
> Hi Folks,
> 
> I have / and /home luks encrypted, and until today the passphrase was
> used to decrypt both partitions, as they are actually the same one.
> 
> From now, i have to type twice, one time per partition.
> 
> I have read about it, and seems that whenever /etc/rc.local gets
> modified it can lead to that behavior.
> 
> Any way to get that fixed?

This is mentioned in bug 679907.