Inkscape trunk from PPA in ubuntu 14.04, error loading .svg files from wikimedia

I was trying to edit some .svg files from wikimedia
http://commons.wikimedia.org/wiki/File:Plum_pudding_atom.svg
http://commons.wikimedia.org/wiki/File:Rutherford_gold_foil_experiment_results.svg
But using inkscape from ubuntu 14.05 I was getting an error: unable to load.

Running from console
inkscape Rutherford_gold_foil_experiment_results.svg
...Rutherford_gold_foil_experiment_results.svg:18: namespace warning : xmlns: URI &ns_svg; is not absolute
     xmlns="&ns_svg;" xmlns:xlink="&ns_xlink;" xmlns:a="http://ns.adobe.com/AdobeSV
                     ^
...
Just searching it seems to be a bug
https://bugs.launchpad.net/inkscape/+bug/166371
and it seems logical, as one of .svg files says
Drawn by User:Fastfission in Illustrator and Inkscape. --Fastfission 15:04, 14 April 2008 (UTC)
It appears as fixed in Inkscape 0.48.5... but in ubuntu I have 0.48.4
So... I check this
https://launchpad.net/~inkscape.dev/+archive/ubuntu/trunk
and I install inkscape-trunk, which removes inkscape  (I also have LibreOfficeDev which coexists with LibreOffice)... and it works.