Graphic issue when changing render distance

https://www.youtube.com/watch?feature=player_detailpage&list=UUTWXvO8rEqDncIBGLDXyJQQ&v=szhcETmhK7g

When i change the render distance this happens.
Also after this happens and i turn my render distance back down things.. aren't right. They're sluggish and the graphics and biome spawn is a little broken. For example a swamp biome that was spawning before i turned up my render distance was suddenly chopped and turned into a plains biome, including cut off water. I had one legged sheared sheep (I hadn't sheered any sheep)
I hadn't noticed until after i recorded the video that these things happened.