This is a forced-crash report after I entered my world in 14w32b (the version of minecraft I was having the visual bugs in). I updated my video card drivers before entering and the problem was fixed.
Updating my drivers and/or the d snapshot seemed to fix it for me.
I have also seen this happen with armor stands, either being completely invisible or rendering only the base at an odd angle (I believe this to be the entity's "feet").
I am sorry about this being a duplicate bug report. I honestly did search the bug tracker for similar bugs and found nothing.
This bug applies to any non-solid block, including hoppers.
@Fluffy89502 the problem is more that it causes the blocks around it to display missing texture.
@Nicholas Chard I totally agree. I think mojang should look at commands in general, as a lot of things were broken with selectors and such in the new snapshots.
@CubeTheThird
I don't think so, as nothing like that was mentioned in any changelog.
@Kumasasa Looking at previous crash reports, I think it might be version 4.2.11476