Model Glitches and Chunk Loading Glitch

These images are all from my brother's Windows 7 PC.
No texture packs or mods are installed. It was a LAN world, and most physics worked fine.
We tested with armor and villagers, because those were the most glitchy. I was on the same LAN world but experienced no problems.

List of warped mobs:
Villagers
Pigman
Rabbit
Ocelot
Mooshroom
Wolf
Endermite
Witch
Magma Cube (Had no face and was flat, least glitchy)
Blaze
Silverfish
Ghast
Slime
Ender Dragon
Wither Skeleton
**Hit boxes remain in the same place, so do any items the mob is holding.

List of warped blocks:
Boat
Minecart TNT
Ender Chest (About 5 different shapes)
Banner
All Heads
Sign
Amour
Enchantment Table
Ender Crystal

The only other programs open at the time were Skype and the Internet (Minecraft.net)

**Note that I was the host of the LAN and I had no problems.
We found that turning VBOs on fixes part of the world chunk loading, but made many blocks invisible.

--Extra Note: We both experienced a small glitch when breaking and placing blocks. It registered what was going on, but the image was delayed.

Here are all the images we took:
http://imgur.com/yLiu7oX,dcQjELq,DsYWRCh,oAl2nSh,sNWjDCU,VgTbIJT,GdtqSAY,cNdhspX,YwN44Mo,PTUWR9l,Bk0ikjh,108d0wz,ENNqqcJ,HdWZe0g,5E4iWUv,eFSG0eF,O4A3KX8,Et6Gj9P,elakZW3,r87Xxtl,gHCGDek,6SSIWdv,NlIZe0l,4kmIyr9,SPsJXpz,f5Q9fAy,aqzhRhM,Bd7LLk5,O4OfJTx,ss5PADw,DvFYZ9e,Yg0Ahkr,sk0Rjy6,OZTea9h,PhMPUof,4oNHqY1,trxdAU7,PplZEJh,DxloQFN,KiuVzl7,5LOGFYY,Zf6PVwG,ojZAGaa,uBv7ORo,buiXKu8,GkKFq0N,moPz5cw,2RBIl6d,wEnxoAo,F8QPqhh,Xffp9n6
If you don't know what some of the images are, post the number and I'll tell you.