In the May 2013 release of SiteCatalyst you enabled classifications for List eVars. Which is great. But ReportBuilder won't let me run reports on the breakdowns which really limits a lot of the functionality enabled by classifing my List eVars.
Please modify Report Builder to enable classification on List eVars.
I am running 18.104.22.168 and waited for the most recent update of ReportBuilder before posting this.