Comments on Group Docs showing up in sitewide activity stream
I just did some testing on the dev site using Safari 5.0.4 on OS X. and noticed that all comments on group docs are showing up in the sitewide activity stream.
When you create a new document the last selection for the settings is left blank ("Who can read comments on this doc?") and even if you select "no one" for both public and private groups, it shows up in the sitewide activity stream. I changed group setting to hidden and it was still listed under sitewide activity. I noticed it was also viewable without being logged into the Commons.