If you’re a bog standard Linux user who never even looks at kernel.org and just accepts whatever kernel your Linux distribution pushes down the repositories, that’s ok. You can probably ignore this news.
For the otherwise curious kernel hackers and developers, the 3.5-rc5 kernel has been pushed through to the tree.
Your local mirror should be updated with the new kernel already. If not, you can download the new update from the official kernel site. http://www.kernel.org/pub/linux/kernel/v3.x/testing/