Shortly after starting a new world, I accidentally looked at an Enderman. As I only had a stone sword and no armor, I fled and the Enderman eventually teleported away. Now every Enderman I find appears provoked (has it's face in the mouth-open expression), but does not attack me or play the sound.
Environment
Windows 7 Professional
Java Version 1.7.0_15
Duplicate of MC-4253, please use the search function to see if your bug has already been submitted. Currently over 53% of tickets are being closed as duplicate.