We note that the Intergovernmental Panel on Climate Change has temporarily removed on-line access to chapters of the Working Group II assessment report on climate change impacts, vulnerability and adaptation. These chapters are undergoing final copyediting prior to publication. It is our understanding that the IPCC may re-post the chapters in a few weeks, and the full report will subsequently be published in book form. It was unusual for the IPCC to post pre-publication chapters. We are not privy to the internal decisionmaking that led, either to the posting of almost-final chapters, or to the decision to take them down, but we are not aware of any wrongdoing in this regard. We will post a notice as soon as we find that the full draft is available again. In the meantime, the Summary for Policymakers is still available on the Working Group II Web site.