Here's what Facebook had to say about today's update, in a post titled STATEMENT OF RIGHTS AND RESPONSIBILITIES UPDATE:
Today we are releasing revised changes to the SRR that reflect changes based on your comments. Even where we did not make revisions, we want to provide you with an explanation of the original change. In fact, many of your comments asked for explanations rather than for changes.
We are re-opening our comment period starting today so that you will have an opportunity to post comments about our new proposed changes. Substantive and relevant comments about specific changes can help us determine whether to incorporate or reconsider a particular proposal or whether a vote is needed.
To see all the changes, you can view this 9-page document: PDF. I haven't had the time to go everything yet, but I did note that the controversial book trademark is still there.
The purple changes are those from the first time around. The blue ones are the new ones. We'll see how much the document changes again, if at all.
If you want to comment on the latest changes, pick your language: English, French, Italian, German, Spanish, Japanese, Turkish, Korean, and Portuguese. So far, most of the comments are just complaints about Timeline.
"We hope you find these responses helpful, and hope that we have addressed your concerns in the responses and our revisions," a Facebook spokesperson said in a statement. "Your trust is extremely important to us. Remember that, as always, you can receive notice of any future changes to our SRR by liking our Site Governance Page."
The last time Facebook updated its SSR document was in April 2011.