Hudson 3.3.0 will be a major release and will involve some library changes. One significant change though for this release will be the adoption of Java 7 as the basline version for running Hudson as opposed to Java 6. Hence we are flagging this as a Major Release.
It will still be possible to use Hudson to compile code with earlier Java versions, but the Hudson server must be running with Java 7
Bugs and Enhancements desired for this release should be tagged in the whiteboard with candidate-3.3.0 as the tag.