I found a broken link in the manual just now.  The appendix link A extensions (on the left nav) gives a 404.<div><br></div><div><br></div><div><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande; min-height: 15.0px">

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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande"><b>Greg Newman</b></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande"><a href="http://20seven.org">http://20seven.org</a></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Lucida Grande">twitter: 20seven</p></div>