Installing Blender from svn on Ubuntu 12.04
You find a very good discription on how to build Blender from svn in this wiki entry:
But if you follow this guideline you will get the following error: “certificate varification error” because the certificate does not expect a Ubuntu Version 12.04.
A simple workaround is to add
ssl-trust-default-ca = no
to the .subversion/servers. This will allow you to verify the cerificate by hand. If you run “svn up” now it will ask wether you want to accept the certificate.