I'm not sure if there is a bigger issue, but i've been unable to install this bundle with Symfony 2.3. I've updated composer.json but not fully tested yet.
I found the same with the fixtures bundle too.
@stof The 2.x-branch is still on symfony 2.0. This also makes me wonder: What is the current state? The 1.0.0-alpha1-tag is from 2011. Shouldn't the 2.x-branch be the current master?