Magento CE Version 1.4.0.1 Stable - Now Available

Magento CE version 1.4.0.1 Stable is now available for download and upgrade.

Please Note: We do NOT recommend upgrading a production installation of Magento directly. Please backup database and all files before upgrading. Please make sure to check file permissions before trying to upgrade through your Magento Connect Manager.

This release mainly fixes an upgrade issue that was experienced while upgrading through Magento Connect Manager and a cache issue in specific environments.

We highly recommend disabling Magento cache before upgrading.

To see a full list of features and fixed issues please visit our release notes page. Diff files are available here.

Since version 1.4.0.0 for security reasons the trace in the Magento error report page is disabled by default. The “Error log number” does not give any information about the error. To enable the trace copy the errors/local.xml.sample to errors/local.xml and follow the instructions described in that file.

Please report all issues with this release in the bug tracker.

Important Note 1: If the Magento Compilation Module is enabled it must be disabled before attempting to upgrade. After upgrading is done, click on “Run Compilation Process” to process and enable it again.

Important Note 2: If you are running Magento in a cluster environment and are using a shared cache (e.g. Memcached) you will now need to also make sure to configure Magento to use Database as the “slow” backend cache.