Comment 99 for bug 876198

one more thing,

If you're going to use the older version and wait it out, you need to learn about apt-pinning.
Unless those packages are pinned, the next upgrade will overwrite them with the latest version.
You'll be right back where you started.

Here are some guides:
Best I can find (incomplete, rambling): http://wiki.debian.org/AptPreferences#Pinning
Official doc (incomplete, outdated and inaccurate): http://www.debian.org/doc/manuals/apt-howto/ch-apt-get.en.html (section 3.10)

It's not the only way, but to make it simple, in "/etc/apt/preferences", for each downgraded package, add:

Package: package-name
Pin: version 0.0-0ubuntu0.0
Pin-Priority: 1001