CRANberries also provides a diff to the previous release. More information is at the RProtoBuf page which has a draft package vignette, a 'quick' overview vignette and a unit test summary vignette. Questions, comments etc should go to the rprotobuf mailing list off the RProtoBuf page at R-Forge.
Changes in RProtoBuf version 0.4.1 (2014-03-25)
Document and add a test for the deprecated group functionality.
CITATIONfile pointing to our arXiv.org preprint.
Fix a bug in the
Import all top-level enums from imported
Removed duplicate enum value type from the unit tests that caused problems with the most recent libprotobuf-2.5. (without option allow_alias).