Comment 12 for bug 1286836

Here's a cleaner variation of the workaround:

sudo dpkg --purge --force-depends libpostproc52
sudo apt-get install libpostproc52
sudo apt-mark auto libpostproc52

The first line purges the package without removing any of the packages that depend on it. (This is fine, since we're going to reinstall the dependency immediately.)

The second line reinstalls the package.

The third line marks the package as automatically-installed (as it is in a stock ubuntu system), so the system knows to treat it as a dependency rather than something the user manually installed.