Those who made the mistake of installing pre-releases of VS2012 alongside other versions got burned badly. In general Microsoft pre-releases of VisualStudio are

Those who made the mistake of installing pre-releases of VS2012 alongside other versions got burned badly. In general Microsoft pre-releases of VisualStudio are so bad that we've resoved to installing them only on VMs. Some who didn't had to resort to reformatting their drive and OS.