Rails 4.0.0.rc1. Fixes base_class issue and deprecation warnings re model scoped and columns_hash. Not backwards compatible with 4.0.0.beta1 and 3.x.
Rails 4.0.0.rc1

Rails 4.0.0.rc1. Fixes :active_record => :base_class issue from April
10, and deprecation warning on model scoped. Not backwards compatible
with 4.0.0.beta1 and 3.x.