LVM shows during install, but lvm2 package isn't installed.
When installing Linux Mint 14, there is native support for LVM. When partitioning the hard drive, the user can clearly see, select and format logical volumes, including putting the /boot partition into a logical volume. However, the installer does not appear to install the lvm2 package.
Upon reboot after a successful installation, if the user chose to put the root partition on LVM, the boot will fail shortly after GRUB as unable to find the root partition. This can be worked around by mounting all relevant folders, chroot-ing into the installed system from another system, and installing the lvm2 package. After that the system functions normally.
Seems a pretty simple fix: just have lvm2 installed by default. A deeper, more thorough solution would be to eventually let the user choose the defaultly installed packages in Mint, but I understand that's a little farther up the totem pole than this issue.