Oxygen 4.1 includes cross-site copy & paste for Oxygen elements, field expansion for settings input fields with "none" units selected, and several enhancements to Oxygen revisions management. There was only one change between the beta and the release candidate to fix an issue that allowed users with restricted access to Oxygen to delete elements they should not be able to delete.
Existing users can download Oxygen 4.1 RC 1 in the customer portal.
Before using a release candidate in a production environment, backup your site. While release candidates have been tested extensively and are considered stable enough for production environments, you should always proceed with caution when using any alpha, beta, or RC version of Oxygen or the associated add-ons. We will provide official support for sites running release candidate versions of Oxygen and the associated add-ons. If you encounter bugs, please report them on GitHub.