Just an observation, here.
It is not possible to build Ardour 3 “from scratch”, as described here:
http://ardour.org/building_linux.html
The build fails during this step, when the script attempts to download the gtk patches from http://ardour.org/files:
$AD/2.0-ongoing/tools/build-gtk-stack --patch
The trouble is that the /files tree is nonexistent. This seems to have happened when the new website went online a few days ago.