title: ActionBarSherlock doesn't show title
body: <pre><code>public class Intro extends SherlockFragmentActivity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.generic);
  
          final ActionBar bar = getSupportActionBar();
          bar.setTitle("test title");
          bar.setTitle("test subtitle");
  </code></pre>
  
  <p>The last two lines have no effect: the title and the subtitle are simply not set. The action bar only contains the logo. Strangely, I haven't found any similar questions, so I must be doing something very wrong.</p>
  
  <p>This is the layout file <code>generic.xml</code>:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent" &gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Any ideas?</p>