Magento has released new version of both the Magento 1x and Magento 2x series.

These releases include important security enhancements, improved functionality and compatibility with the latest USPS changes.

Magento 1x latest releases:
– Magento Community Edition 1.9.2.3
– Magento Enterprise Edition 1.14.2.3

Magento 1x latest releases:
– Magento Community Edition 2.01
– Magento Enterprise Edition 2.01

Existing users of Magento 1x is advised to update to latest version or add in all security patches for their version up to an included the newly released SUPEE-7405 and SUPEE-7616.

Users of Magento 2.0 is advised to upgrade to V2.01

Resources:
– Magento CE Downloads
– Magento 2x Upgrade Guide
– Magento CE 1.9.2.3 Change-log
– Magento CE 2.0.1 Change-log
– Magento EE 2.0.1 Change-log