Merge commit '53d5940d4df8acc57dcd0c62ef45c8a46e53d13c' into HEAD

Author: jools

manual/en-US/appendices/history.md

@@ -1,5 +1,10 @@
 ### Release History
 
+#### Version 12.3
+
+Version 12.3 ("Curiosity") of the Joomla Platform was tagged and released on 19 December 2012. 
+[Release notes for version 12.3](http://developer.joomla.org/news/547-version-12-3-of-the-joomla-platform-released.html)
+
 #### Version 12.2
 
 Version 12.2 ("Neil Armstrong") of the Joomla Platform was tagged and released on 21 September 2012.