v4.0.1 is a minor release. It includes a new class, KinshipNameCalculator, that determines a name for the relationship between two individuals, and largely makes the RelationshipCalculator class obsolete (but that class still remains).
Issues from Github (https://github.com/frizbog/gedcom4j/issues):
v4.0.0 is a major release that adds a revamped validation framework, new first-order support for custom tags, and support for third party custom tag sets. Most users, particularly those who used the validation framework or used custom tags, will need to make changes to accommodate API changes. See the Release 4.0.0 Notes page for details.
v3.2.2 is a minor fix release that addresses a handful of issues:
v3.2.1 of gedcom4j. Fixes a vulnerability to NullPointerExceptions when parsing dates (Issue #157).
v3.2.0 is a minor release with a number of backward-compatible API changes for bug fixes and enhancements.
v3.1.0 is a minor release with some new backward-compatible API changes for bug fixes and enhancements.
v3.0.3 is a minor fix release.
v3.0.2 is a minor fix release. Addresses an issue where RelationshipCalculator was prone to NullPointerExceptions for Individuals with a null value for their sex property.
This release addresses a few bugs and adds support for parsing date strings.
v3.0.0 is a major release. Most existing code using earlier versions of gedcom4j will need significant modification, primarily around the object model.
The following enhancements and fixes are included: