problem with render distance

um there is a bug in both 14w30a-b and 14w31a
there seems to be an issue with the render distance!
It seems like if you don't have you vbos on theres glitch or bug with in over 10 render distance where you can't see nothing but randomly spinning chunks!
its one of the most wildest bugs I've seen so far but it doesn't seem to crash MC!
Hope you figure whats up with that by the next snapshot!
I don't know if its a problem for everyone but it sure is for me!
Would you happen to know what this bug is called?