title: Process-crash with the message "RPC server is unavailable" on opening a save file dialog?
body: <p>On Windows 7 64-bit, I use Qt 4.5.3 to call QFileDialog::getSaveFileName. Immediately on calling this function, my process crashes with the message "The RPC server is unavailable".</p>
  
  <p>I found this, but it doesn't solve my problem:
  <a href="https://stackoverflow.com/questions/1063096/the-rpc-server-is-unavailable">&quot;The RPC server is unavailable&quot;</a></p>
  
  <p>Any ideas?</p>