The core purpose of the 3.2.0 release is to uplevel the version of Spring Security used within Hudson to allow us to address some security issues and generally keep up to date. This involves a wholesale cascade of library changes but the aim is to do this with no disruption to consumers. Because of the potential for plugin breakages this is marked as a major release.
Apart from this important (and potentially disruptive task), the key proposed focus for this release continues on the support for Enterprise Hudson deployments theme and Team Concept.
Whiteboard tag for new features and flagged bug-fixes is: candidate-3.2.0