How to avoid ugly Compiz/Gnome shadow for Conky?

<p>I'm using Ubuntu 10.04 with Gnome and installed <a href="http://conky.sourceforge.net/" rel="nofollow">Conky</a> recently.</p> <p>It works very well and I really like Conky. One problem exists nonetheless:<br> Compiz or Gnome create a drop shadow to all windows. I like this effect for all windows but not for Conky. Conky has now an ugly shadow that looks like it's not embedded into the desktop.</p> <p>How can I disable this drop-shadow for Conky only?</p> <p>Is it possible to define an exclusion for some applications?</p>