Magento Community Edition 1.9.2 has been released, This release includes bug fixes, security patches, speed improvements, optimizations and new test tools.

• Security patches up to and including SUPEE-6285.
• Indexing optimization
• Cache optimization
• Updated Zend Framework version
• Updated Redis Integration
• Magento Test Framework

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Resources:
– Magento CE Downloads
– Magento CE 1.9.2 Change-log