title: Ubuntu 12.10 libgtk-3-0 Missing Symbols
body: <p>I am running Ubuntu 12.10 and somehow my libgtk-3-0 became screwed up. When trying to run many different apps, I get errors like:</p>
  
  <pre><code>gedit: symbol lookup error: /usr/lib/libgtk-3.so.0: undefined symbol: g_action_group_action_state_changed
  </code></pre>
  
  <p>I've tried to reinstall libgtk-3-0:</p>
  
  <pre><code>sudo apt-get install --reinstall libgtk-3-0
  sudo apt-get update
  sudo apt-get upgrade
  </code></pre>
  
  <p>But still I get this problem - several undefined symbols from libgtk-3.so.0 when trying to run various apps. There is no problem booting the system. How can I fix this?</p>
  
  <p>UPDATE:</p>
  
  <p>My version of libgtk is installed as:</p>
  
  <pre><code>/usr/lib/libgtk-3.so.0 -&gt; libgtk-3.so.0.400.2
  </code></pre>