Random chunks flickering

That just looks like chunks haven't finished being created in a brand new world. Give it a minute and it'll be fine. (your lack of description doesn't help us know if this world is new or not)

Well, my game is open for 20m now and still happening.

Edit: And its a new world.

Similar here:
New World (14w30b)
32 Chunk Render Distance

If i walk/run, some Chunks flicker.

00:00 FOV: normal
00:21 FOV: Quake Pro
http://www.youtube.com/watch?v=KxYw657HxFw

If this is FOV related then this will be a duplicate of MC-63020.

No, FOV to see it better

Did you try in 14w30c? A bunch of the new rendering glitches got repaired.

Fixed it, thx!

I guess this can be marked as resolved then. 🙂