If you are using a released version of Kubernetes, you should refer to the docs that go with that version.
The latest release of this document can be found [here](http://releases.k8s.io/release-1.4/docs/user-guide/known-issues.md).Documentation for other releases can be found at releases.k8s.io.
This file has moved to: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md