We've shaken a few bugs out of the 1.7.x branch. Errors on duplicate CA certificates on Windows are now gracefully handled. Rest-client will now allow but not depend on mime-types 2.0. A large number of gems had dependencies on mime-types ~> 1.x, which meant that they were incompatible with the pin on ~> 2.0 that was temporarily introduced by rest-client 1.7.0.