Wrong link in blog ispconfig-3-1-beta-2-released-for-testing
<h3>Download</h3>
..
<p><a href="http://www.ispconfig.org/downloads/ISPConfig-3.1b1.tar.gz">http://www.ispconfig.org/downloads/ISPConfig-3.1b2.tar.gz</a></p>
href got a typo (sed/b1.tar.gz/b2.tar.gz)