When you hold a barrier block in your secondary hand, the barriers indications in the barrier blocks in the world doesn't appear.
Environment
Java 1.8.0_25 64 bits.
3Go RAM allocated.
8x Intel Core i7-2630QM @ 2.00Ghz
Nvidia GeForce GT 540M/PCIe/SSE2
Windows 10 Home 64bits
This issue duplicates MC-83003