Hey, guys.
I was wandering the minecraft forums a few days ago when I stumbled upon a supposed fix for a couple game problems, including the far render crash.
Here's an excerpt:
"siberx wrote:I've been running into this bug constantly (locking up every couple minutes in certain areas of our multiplayer map), probably due to a bugged tile entity somewhere (a chest, sign, furnace or mob spawner). I got so fed up I decompiled the Minecraft jar and I think I've worked around the problem with a small mod.
The code was not doing a null check at a certain point when it probably should've, so I've added a fallback case to avoid the null pointer exception. Who knows if it's the "correct" way to fix it (I can hardly tell what's going on with how obfuscated the code is) but it appears to have stopped to lockups. If you're feeling brave you're free to try it with no warranty as to whether it'll blow up or not; two of us have played for a few hours each now though without a single lockup.
To install it, open your minecraft.jar (located in the .minecraft/bin folder under your Application Data or Appdata/Roaming folder) with WinRAR, delete fz.class and the META-INF folder, and drag the new fz.class file in (BE SURE TO BACK UP YOUR MINECRAFT.JAR FIRST). Give it a shot, and please report here if it works or not for you and any other problems that crop up."
Here's the link to the file:
http://www.kimenet.ca/dump/fz.classI've been running the new file for all of today and I don't recall any render/warp crashes today, could you guys test this out some more?