The validates_url_format_of gem was poorly maintained. I know, because I help maintain it. :P
Add delayed_job_active_record dependency needed for DJ 3.0.0.pre.
Making an exception to the mid-week update policy in order to resolve the YAML::Syck::DefaultKey issue.
I spent a day trying to get the cukes passing with the latest version of these gems and failed miserably. Perhaps someone else can try again in the future. I've created an issue so it doesn't get forgotten: #314