I believe its default is set to 10min (way to long for a professional-use application).
Here’s a great tutorial on how to change the auto-refresh interval. It’s easy and takes about 2 mins.
http://www.macosxhints.com/article.php?story=20081204143710211
Note: The only thing left out, is that you need to quit the notifier, and restart it for the preferences to take effect.
Rock on! Thanks Matt! :)