Toolbx 0.3 contains some important improvements and bug-fixes to the feature that ensures that the certificates from certificate authorities (or CAs) that are available inside a container are kept synchronized with the host operating system. These don't affect the UBI images for RHEL, but do affect containers created from the arch-toolbox and fedora-toolbox images.

Some really old containers are now deprecated, before support for them is completely dropped. This can help us avoid having to support them for too long in the future.

See: https://github.com/containers/toolbox/releases/tag/0.3