title: QFileDialog::getOpenFileName doesn't set the initial directory on Mac OS 10.8 Mountain Lion
body: <p>I can not change the current directory with QFileDialog with Qt 4.8. The same code works fine on Windows and Mac OS 10.6 Snow Leopard. It also works fine if I don't use the native Mac OS X dialog.</p>
  
  <p>This works:</p>
  
  <pre><code>fn=QFileDialog::getOpenFileName(this,"Select File","/Users/myuser/Desktop",QString(),0,QFileDialog::DontUseNativeDialog);
  </code></pre>
  
  <p>This doesn't work:</p>
  
  <pre><code>fn=QFileDialog::getOpenFileName(this,"Select File","/Users/myuser/Desktop");
  </code></pre>
  
  <p>It looks like if most of the time it opens the last path of the last call to getOpenFileName.</p>