Upon world loading, it seemed to work fine until I changed render distance from 3 to 6 (though this still occurs without changing render distance), the world will seemingly have invisible chunks in a straight line. Coming near the invisible chunk will result in caves exhibiting extremely odd behavior (the caves will appear to literally move around me). Animals will also appear to be missing limbs (which while it is funny looking it is obviously an issue) and smaller animals will not have a model at all.
I'm not sure how to reproduce it, as this is a bug that I have only ever seen in this snapshot. I just loaded the world and the bugs marched on in with it.

(PS. Please note that the screenshots below are before I updated to the most recent Java, however the bug still persists in 1.7.0_65 (the most recent Java)).
If a forced crash log is needed I am able to provide one.