Late last week, I saw dozens and dozens of threads in the Google Docs Help discussion forum, where Googlers were saying that they would contact these individuals directly, via email. Now, I saw a bunch of these, but didn't really look into them, simply because the issue was handled off the public forum.
We wanted to let you know about a bug (now fixed) that affected a small percentage of users who may have shared permissions between some documents in their account without their knowledge. This inadvertent sharing happened only when the document owner, or a collaborator with sharing rights, selected multiple documents and presentations from the documents list and changed the sharing permissions. (This issue didn't affect spreadsheets.) As part of the fix, we used an automated process to remove collaborators and viewers from the documents that we identified as being affected. We apologize for the inconvenience of having to re-share your docs. We have sent notifications to the owners of impacted docs, informing them of this fix and posted this information to the Apps Status Dashboard: http://www.google.com/appsstatus
Can you imagine if you were sharing financial information or personal medical information with someone and some how, it was shared with strangers? And Google wants you to use Google Health to share your most confidential and personal details with your doctor and family? I am all for sharing in exchange for convenience but what is stopping a security bug like this from happening on Google Health?
Forum discussion at Google Docs Help.