A summary of the features in Molpro can be found in a recent review: H.-J. Werner, P. J. Knowles, G. Knizia, F. R. Manby, and M. Schütz, Molpro – a general purpose quantum chemistry program package, WIRES Comput. Mol. Sci. 2, 242 (2012), doi:10.1002/wcms.82.
The new features of MOLPRO version 2012.1 include the following.