We're hearing from tipsters and a number of other sources, including Google's own Product Forums, that a bug is causing some Google Hangouts and Google Talk messages to be sent to the wrong recipients. A few awkward situations have already ensued, according to TechCrunch, such as internal company communications being sent to ex-employees. The privacy bug seems to crop up when users of the old Google Talk platform try to connect with those who have migrated to the newer Hangouts service, so it sounds like it could be a transitional thing -- it's also reminiscent of a similar bug that hit Skype last year. Meanwhile, some of us here at Engadget are currently experiencing the more fundamental (though thankfully less embarrassing) problem of not being able to log onto Hangouts in the first place.
Update: Google' status page reports that the issue has been resolved and that services are "gradually returning to normal." It says it will update users again when the full service is restored.