Recent Debian Preseed Error: "Logical Volume Manager not available"

[Chris Hiestand <chiestand@salk.edu>]

I've had a stable, working, preseed configuration with no changes other than downloading the latest stable debian releases (netboot images). Suddenly partman has stopped working in my preseed:

> Loading additiona components …100%
> Starting up the partitioner …100%
> Partition disks
> ---------------
> 
> !! ERROR: Logical Volume Manager not available
> 
> The current kernel doesn't support the Logical Volume Manager. You may need to load the lvm-mod module.


I'm not even creating an LVM-managed partition, just a basic one:

> d-i partman-partitioning/confirm_write_new_label boolean true
> d-i partman/choose_partition select finish
> d-i partman/confirm boolean true
> d-i partman/confirm_nooverwrite boolean true
> 
> d-i partman-lvm/device_remove_lvm boolean true
> d-i partman-md/device_remove_md boolean true
> 
> d-i partman/mount_style select uuid
> d-i partman/default_filesystem string ext4
> 
> partman-auto partman-auto/disk string /dev/sda
> partman-auto partman-auto/init_automatically_partition \
>   select Guided - use the entire disk
> partman-auto partman-auto/method string regular


Did the new kernel release drop LVM support, despite being required by preseed partman? Is anyone else having this problem?

Other info:
*Running partman on the busybox command line yields the same message
*Running 'modprobe lvm-mod' on the busybox CLI yields "FATAL: Module lvm_mod not found" - there is no such module in the modules subdirectories.

Thanks,
Chris