Mobs looking in the wrong direction

Creeper in the screen shot is walking towards me, but is looking to its right.
The same behaviour was also seen in a skeleton.

[21:27:00 INFO]: Minecraft Launcher 1.6.51 (through bootstrap 100) started on windows...
[21:27:00 INFO]: Current time is Feb 11, 2016 9:27:00 PM
[21:27:00 INFO]: System.getProperty('os.name') == 'Windows 8.1'
[21:27:00 INFO]: System.getProperty('os.version') == '6.3'
[21:27:00 INFO]: System.getProperty('os.arch') == 'amd64'
[21:27:00 INFO]: System.getProperty('java.version') == '1.8.0_25'
[21:27:00 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[21:27:00 INFO]: System.getProperty('sun.arch.data.model') == '64'