I just did my first install of observium after a very convicing demo by a friend.
However the website only loads the header (or parts of it).
When I add /debug to the address I get this output

Notice: Undefined index: page_title in /opt/observium/html/index.php on line 107 Notice: Undefined index: widescreen in /opt/observium/html/index.php on line 125
Notice: Undefined index: bare in /opt/observium/html/index.php on line 217
Notice: Undefined index: widescreen in /opt/observium/html/includes/header.inc.php on line 18 Widescreen | Notice: Undefined index: authenticated in /opt/observium/html/includes/header.inc.php on line 25 Not logged in! Fatal error: Class 'Net_IPv6' not found in /opt/observium/html/includes/header.inc.php on line 32

For installation I followed this guide and also created a virtual host to run the observium webserver from:
http://www.observium.org/wiki/Ubuntu_SVN_Installation
I did everything and all the guide says - in that order - and did not do anything other than that.

Obviously it seems like a problem with the Net_IPv6 package in PHP.
Ubuntu is 10.04 and I meet all the requirements set forth in the requirements section of the install page.

I am aware it might not be an observium error as such, but the googles is not really that helfull and my own skills are lacking a bit when it comes to webservers.

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-Lasse-