As an aside, a lot of confusion could be avoided if FamilySearch would be a little more judicious in using the term "new" for everything. I find a lot of confusion between the new FamilySearch Family Tree and New.FamilySearch.org. See what I mean?Sources are no longer available through new.familysearch.org. If you don't have access to FamilySearch's new Family Tree feature, click the link below.
Back to the subject. Apparently, anyone who tries to view a source or enter another source into New.FamilySearch.org will be directed to Family Tree. You get a view of the existing sources and when you close the window, this message pops up.
I am noticing that additional inaccurate information keeps being posted to Family Tree all the time. I cleaned up a couple of my ancestors only to find a long list of additional wrong information added to the site. Looks like a full time job with overtime.