Version 3.12.1

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@11894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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+2012-06-21: Version 3.12.1
+
+        Performance and stability improvements on all platforms.
+
+
 2012-06-20: Version 3.12.0
 
         Fixed Chromium issues: