My Galaxy S3 says “automatic backup failed” without any mention of its origin, nor a popup is opened when touched. While looking for a possible solution on the net, I’ve stumble over Google+ trying to sync all photos and media automatically using wifi access. I remember that I had that disabled in Picasa, and told Google not to sync photos from my mobile to my Google+ account, even with wifi access.
Well, Google+ uses a new setting, having that enabled by default – WTF? Kill it with fire.