crytptab man page should mention running update-initramfs

http://manpages.ubuntu.com/manpages/precise/en/man5/crypttab.5.html

That man page should mention running `update-initramfs -c -k all'. The reason is that some of the content of crypttab is copied into the initramfs. Consequently you can end up changing the file itself over and over and it has no effect until the initramfs is next rebuilt.

As far as I can tell the content that is copied is the root file system and swap.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: cryptsetup (not installed)
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Mon Jul 9 10:26:06 2012
SourcePackage: cryptsetup
UpgradeStatus: No upgrade log present (probably fresh install)