# apt-get install linux-backports-modules-jaunty
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  linux-backports-modules-2.6.28-18-generic linux-backports-modules-jaunty-generic
The following NEW packages will be installed:
  linux-backports-modules-2.6.28-18-generic linux-backports-modules-jaunty
  linux-backports-modules-jaunty-generic
0 upgraded, 3 newly installed, 0 to remove and 85 not upgraded.
Need to get 1308kB of archives.
After this operation, 5128kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://us.archive.ubuntu.com jaunty-updates/main linux-backports-modules-2.6.28-18-generic 2.6.28-18.20 [1301kB]
Get:2 http://us.archive.ubuntu.com jaunty-updates/main linux-backports-modules-jaunty-generic 2.6.28.18.23 [3690B]
Get:3 http://us.archive.ubuntu.com jaunty-updates/main linux-backports-modules-jaunty 2.6.28.18.23 [3666B]
Fetched 1308kB in 11s (118kB/s)
Selecting previously deselected package linux-backports-modules-2.6.28-18-generic.
(Reading database ... 326804 files and directories currently installed.)
Unpacking linux-backports-modules-2.6.28-18-generic (from .../linux-backports-modules-2.6.28-18-generic_2.6.28-18.20_amd64.deb) ...
Selecting previously deselected package linux-backports-modules-jaunty-generic.
Unpacking linux-backports-modules-jaunty-generic (from .../linux-backports-modules-jaunty-generic_2.6.28.18.23_amd64.deb) ...
Selecting previously deselected package linux-backports-modules-jaunty.
Unpacking linux-backports-modules-jaunty (from .../linux-backports-modules-jaunty_2.6.28.18.23_amd64.deb) ...
Setting up linux-backports-modules-2.6.28-18-generic (2.6.28-18.20) ...
update-initramfs: Generating /boot/initrd.img-2.6.28-18-generic
cp: `/usr/lib/libltdl.so.7' and `/tmp/mkinitramfs_RXbflT/usr/lib/libltdl.so.7' are the same file
cpio: ./usr/lib/pcsc/drivers/towitoko.bundle/Contents/Linux/libtowitoko.so.2.0.0: Cannot stat: No such file or directory
update-initramfs: failed for /boot/initrd.img-2.6.28-18-generic
dpkg: error processing linux-backports-modules-2.6.28-18-generic (--configure):
 subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of linux-backports-modules-jaunty-generic:
 linux-backports-modules-jaunty-generic depends on linux-backports-modules-2.6.28-18-generic; however:
  Package linux-backports-modules-2.6.28-18-generic is not configured yet.
dpkg: error processing linux-backports-modules-jaunty-generic (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of linux-backports-modules-jaunty:
 linux-backports-modules-jaunty depends on linux-backports-modules-jaunty-generic (= 2.6.28.18.23); however:
  Package linux-backports-modules-jaunty-generic is not configured yet.
dpkg: error processing linux-backports-modules-jaunty (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                No apport report written because the error message indicates its a followup error from a previous failure.
                                Errors were encountered while processing:
 linux-backports-modules-2.6.28-18-generic
 linux-backports-modules-jaunty-generic
 linux-backports-modules-jaunty
E: Sub-process /usr/bin/dpkg returned an error code (1)

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My experiences with broken packages with problem files (mostly from back when I was still running Libranet 2.x and Debian Unstable) has been unhelpful here.  I'm pasting this here largely for future reference of developers and others running into this problem, as I hope to somehow solve this long before anyone replies here, even if it's the unsatisfying solution of backing out of installing the package that leaves me with my original problem unsolved.