Milestones belong to a series and can be created from the series page by a project owner or series release manager.

Version Series Expected Released Summary
Polly pre-alpha-4 1.0 None not yet released Port to GTK3.
Polly pre-alpha-3 1.0 None 2011-11-10 Port to streaming API.
Polly pre-alpha-2 1.0 None 2011-09-18 Basic framework stabilized.
Polly pre-alpha-1 1.0 None 2011-05-31 Initial release.