This probably comes from /etc/init.d/umountroot, in the initscripts package. Could you check whether commenting out the 'umount -l /var/lock' and 'umount -l /dev/shm' lines cause the errors to go away?
This probably comes from /etc/init. d/umountroot, in the initscripts package. Could you check whether commenting out the 'umount -l /var/lock' and 'umount -l /dev/shm' lines cause the errors to go away?