My Galaxy S3 has just shown the blinking message
shell has been granted superuser permissions (when clicking a Pinterest notification). The phone is not rooted and is running Android 4.0.4. What does it mean? I've done extensive googling but could only find posts related to rooted phones.
Update 2014-08-29: Today got the notification again. It appears 3 or 4 times (kind of blinks) at the bottom of the screen and then disappears. Root Checker Basic still says "Sorry! This device does not have proper root access." I am quite lost.