My upgrade process seems to be stuck. Can't seem to find anything on the Internet about this particular problem.
Here's what I can see.
I've since killed the process and tried anew.
$ sudo dpkg --configure -a
Setting up initramfs-tools (0.103ubuntu0.2) ...
update-initramfs: deferring update (trigger activated)
Setting up rhythmbox-plugins (2.97-1ubuntu6.1) ...
Setting up grub-pc (2.00-7ubuntu11) ...
Installation finished. No error reported.
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.5.0-25-generic
Found initrd image: /boot/initrd.img-3.5.0-25-generic
Found linux image: /boot/vmlinuz-3.2.0-38-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-38-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-37-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-37-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-36-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-36-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-35-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-35-generic-pae
Found linux image: /boot/vmlinuz-3.2.0-34-generic-pae
Found initrd image: /boot/initrd.img-3.2.0-34-generic-pae
Found memtest86+ image: /boot/memtest86+.bin
Same deal.