Facebook maintains that users must agree to a license in order for the site to share their data with other people. The user agreement grants Facebook the right to use their content in a wide variety of ways.
But the changes removed two sentences reading: "You may remove your user content from the site at any time. If you choose to remove your user content, the license granted above will automatically expire, however you acknowledge that the company may retain archived copies of your user content."
It prompted concerns that Facebook could, for example, harvest a deleted photo and use it in promotional material, among other scenarios.
Facebook users immediately revolted, prompting several new groups on the site dedicated to fighting the changes. The Electronic Privacy Information Center (EPIC), a privacy watchdog, said on Tuesday it was preparing to file a formal complaint with the Federal Trade Commission over the social network's updated licenses.
Zuckerberg wrote it will take the company a few weeks to revise the service terms, saying the new agreement will be clearly written and incorporate suggestions from Facebook users. Users can contribute their ideas via a new group, Facebook Bill of Rights and Responsibilities.