WebLogic Server 12c on OTN. This is still at 188.8.131.52 but has been repackaged to include some additional patches and is delivered as a "pre-patched" distribution. For x86 based 64bit systems the Oracle support site lists 19 single patches are available.
Mainly four areas have been corrected with the patches. You now have a bunch of JDK 7 certification patches some Contexts and Dependency Injection patches the Deployment performance optimization patches and last but not least the Developer experience patch which only applies to the developer-only distribution.
The details describing this are provided in updated product documentation, notably:
- What's New documentation
- Updated Release Notes