This release fixes a Cross Site Scripting (XSS) security issue. Please see the security advisory for more information. SA-CONTRIB-2012-164 - Smiley module and Smileys module - Cross Site Scripting (XSS)
Fixes a CSRF security issue. SA-CONTRIB-2012-162 - RESTful Web Services - Cross site request forgery (CSRF)
API change: The format extension in URL paths only works for GET requests now. Example that still works:
GET http://example.com/node/123.json GET http://example.com/node.json
Examples that do not work anymore:
GET http://example.com/node/123.json
#1444186: Password Changes / Make User Admin
SA-CONTRIB-2012-163 - User Read-Only - Permission escalation
#1444186: Password Changes / Make User Admin #1372778: user_readonly breaks form api
Includes important security update - http://drupal.org/node/1813550