As you may know, we recently rolled out some design changes to a small percentage of Yahoo! Groups in the US. During the rollout, users discovered a bug in the user interface that may have inadvertently allowed some users to see the email addresses of other users that were not previously visible to them. When we were made aware of this bug, the new design was disabled within 24 hours to make sure that we could adequately investigate the situation.
At Yahoo!, we take privacy very seriously. Our teams work closely together to ensure that privacy is key component of the product planning process. We are always working to improve our testing processes to try to ensure that these things don’t happen in the first place. When we do discover a bug with our products we work quickly to resolve it. Your trust is paramount to us.
Anne Toth and Jim Stoneham