Same for me - but I noticed that it suddenly started syncing to Google+ too a few weeks ago (not sure why it started doing this, either there was an update or it was because I logged into Google+ using the default Android Google+ app and it enabled it then). Either way, I wasn't particularly happy about it, though I believe it uploaded them but did not make them public. I turned it off as soon as I noticed as I don't need my photos synced to two places and I already had photos synced to DropBox.