Arduino IDE 1.0.5 - MAC OS X 10.8.4 opens two windows


I'm using Arduino IDE 1.0.5 on a MAC OS X 10.8.4.

When I double-click a *.ino file in the Finder the Arduino IDE starts and opens two windows,
an empty one and a window with the sketch.

Is there a way to avoid opening the empty window?

Edit: I've moved this posting to "Installation & Troubleshooting"