title: Android update 17 seems incompatible with external Jars
body: <p>I just allowed my Mac to do an update on its Java installation and now some of my old jars (like <code>javax.mail</code> and <code>apache.commons.httpclient</code>) are throwing <em>"class not found"</em> exceptions at run time!</p>
  
  <p>Meaning, they compile fine, but then crash at run time with exceptions that look like this:</p>
  
  <pre><code>E/dalvikvm(2414): Could not find class 'javax.mail.internet.InternetAddress', referenced from method com.my.project.Main.isValidEmailAddress
  </code></pre>
  
  <p>Do I need to get more recent versions of the jars that have those classes? Or do I need to revert to my previous version of Java?</p>
  
  <p>Or is this some totally unrelated problem that I'm just assuming has to do with the Java update <em>(would be quite a coincidence, all of this worked perfectly prior to the update)</em>?</p>