# apt-get upgrade
...
Processing triggers for initramfs-tools (0.103ubuntu4.2) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-29-generic
cp: cannot stat '/lib/libcidn-2.19b.0.so': No such file or directory
cp: cannot stat '/lib/libcidn-2.19b.0.so': No such file or directory
cp: cannot stat '/lib/libcidn-2.19b.0.so': No such file or directory
cp: cannot stat '/lib/libcidn-2.19b.0.so': No such file or directory
cp: cannot stat '/lib/libcidn-2.19b.0.so': No such file or directory
E: /usr/share/initramfs-tools/hooks/fixrtc failed with return 1.
update-initramfs: failed for /boot/initrd.img-3.13.0-29-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
Errors were encountered while processing:
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

# dpkg -S libcidn
libc6:i386: /lib/i386-linux-gnu/libcidn.so.1
libc6-i386: /lib32/libcidn-2.19.so
libc6:amd64: /lib/x86_64-linux-gnu/libcidn-2.19.so
libc6-dev:amd64: /usr/lib/x86_64-linux-gnu/libcidn.so
libc6-dbg:amd64: /usr/lib/debug/lib/x86_64-linux-gnu/libcidn-2.19.so
libc6-i386: /lib32/libcidn.so.1
libc6:amd64: /lib/x86_64-linux-gnu/libcidn.so.1
libc6:i386: /lib/i386-linux-gnu/libcidn-2.19.so