I just received a notification "Important Information about Google+ APIs" about the profile information leak to apps by Google+ API.
The attachment states that the app "Stack Exchange" had access to my "About, Partial Birthday, Gender, Relationship Status" but
We have no evidence that the app developers who inadvertently had this access for six days were aware of it or misused it in any way.
Now, in my case there was no data to leak (I think), and personally I trust that Stack Exchange didn't rush to mass-download data, but can we have an explicit confirmation by Stack Exchange that they didn't download or store such data? Maybe there are cases where it was transmitted unwittingly and stored on some log file. :-)