I've been trying to install Pd vanilla on Ubuntu 12.04 together with Pd-extended. I think I've created some mess as there are symbolic links pointing at other symbolic links pointing at pd-extended.
Even though I thought I hadn't managed to install vanilla, I realised it's sitting in /usr/bin/ as puredata. In /usr/lib/ there is a pd/ directory which includes a doc/ and a extra/ directory, but these two directories have only Gem stuff, no [bonk~] or [fiddle~] or [expr~] (even though I can create all these objects).