If you place nether brick or nether bricks stairs, the edges of the block (or stair) have small white dots that jump around on them. This is also seen while holding the block in your hand. (This also is seen to a small extent on obsidian)
(Also seen of iPod touch 4G)
Linked issues
Comments 2
Duplicate of MCPE-1068.
It happens with ALL BLOCKS, including the torches at the night.... This is a duplicate but i can´t find the issue i have seen....