This is just to publicize the fact that many gnome packages depend upon devicekit-disks devicekit-disks is incompatible with dmsetup and therefore lvm2. If your / is on a lvm2 group you will not be able to boot. here is a debian bug reference: http://bugs.debian.org/550434 if you have gnome installed and do apt-get dist-upgrade and don't see the warnings, you will not be able to boot. Mitchell