I noticed that the kind developers of Hydrogen have posted an update for us at their website. This worked on Jaunty Jackalope for me. Also available are Windows binaries for Hydrogen that work in Vista.
You can install it by downloading from SourceForge using the commands below:
cd
mkdir source
cd source
wget http://softlayer.dl.sourceforge.net/sourceforge/hydrogen/hydrogen_0.9.4rc1_i386.intrepid.deb
dpkg -i hydrogen_0.9.4rc1_i386.intrepid.deb
Of note, is more use [...]