title: Drawable not showing up
body: <p>I have a fairly simple xml file that has an image button in it. The image shows up fine on the Graphical Layout xml designer, shows up fine when I run a development build, but as soon as I create the signed apk file and run it, the image no longer shows up. It's just an empty button. I can't think of a reason why, any ideas? The xml file looks like this:</p>
  <pre><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&gt;
  &lt;LinearLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
      android:id=&quot;@+id/navigation_root&quot;
      android:layout_width=&quot;match_parent&quot;
      android:layout_height=&quot;wrap_content&quot;
      android:orientation=&quot;vertical&quot; &gt;
  
      &lt;TextView
          android:id=&quot;@+id/navigation_text&quot;
          android:layout_width=&quot;match_parent&quot;
          android:layout_height=&quot;wrap_content&quot;
          android:padding=&quot;5dp&quot;
          android:text=&quot;TextView&quot;
          android:textAppearance=&quot;?android:attr/textAppearanceLarge&quot; /&gt;
  
      &lt;SeekBar
          android:id=&quot;@+id/navigation_seekbar&quot;
          android:layout_width=&quot;match_parent&quot;
          android:layout_height=&quot;wrap_content&quot;
          android:layout_gravity=&quot;center_vertical&quot;
          android:layout_weight=&quot;1&quot;
          android:padding=&quot;5dp&quot; /&gt;
  
      &lt;LinearLayout
          android:id=&quot;@+id/linearLayout1&quot;
          android:layout_width=&quot;match_parent&quot;
          android:layout_height=&quot;wrap_content&quot;
          android:padding=&quot;5dp&quot; &gt;
  
          &lt;ImageButton
              android:id=&quot;@+id/part_select_button&quot;
              android:layout_width=&quot;wrap_content&quot;
              android:layout_height=&quot;wrap_content&quot;
              android:src=&quot;@drawable/chapter_select&quot; /&gt;
  
          &lt;Button
              android:id=&quot;@+id/navigation_ok_button&quot;
              android:layout_width=&quot;75dp&quot;
              android:layout_height=&quot;match_parent&quot;
              android:layout_weight=&quot;1&quot;
              android:text=&quot;@string/ok&quot; /&gt;
  
          &lt;Button
              android:id=&quot;@+id/navigation_cancel_button&quot;
              android:layout_width=&quot;75dp&quot;
              android:layout_height=&quot;match_parent&quot;
              android:layout_weight=&quot;1&quot;
              android:text=&quot;@string/cancel&quot; /&gt;
      &lt;/LinearLayout&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  <p>The image <code>@drawable/chapter_select</code> is a fairly small (41*41) png file that is in the res/drawable folder.</p>