Milestone (M) builds occur throughout the development cycle when a significant set of features or bugs have been implemented. The build will be stable enough for testing those new changes but may have introduced new bugs or instabilities to other parts of the code. Milestones give the community an opportunity to provide feedback on a feature while there is still time to change it during that development cycle. Milestone builds should never be put into production.
Download pages also available for Stable Builds and Release Candidates.
There are currently no Milestones or RCs available for testing. Stable Builds are available.