What does eclipse API freeze mean?

The eclipse 3.2 APIs have been frozen. John Arthorne has send a mail to eclipse-dev@eclipse.org:

Between now and the 3.2 release, all changes to API require the following action before releasing any code:

1. A bug report describing the change, and the reason it is required.
   
2. Approval from a PMC member (in the form of a +1 on the bug report).
   

Also, if it is a breaking API change, you should search for references across the SDK, and coordinate the release with any clients that have already adopted the API being broken.

The PMC has asked Boris Bokowski and I to track API changes during this period. Please also CC either Boris or myself on the bug so we can keep track of the changes.