We will be making the current experimental version (3.10) the default version on or shortly after November 15, 2012. The versions will then be:
Experimental: 3.11
Release (default): 3.10
Frozen: 3.9
3.8 will be removed, and you will be provided with 3.9 if you request it.
We encourage you to test your applications with 3.10 before November 15, which you can do by adding v=3.10 when loading the Maps API. If you like to live on the edge, you can add v=3.exp to always receive the current experimental version with all of its latest features.
For more information about Maps API versioning, see:
To report issues with any version of the API, see: