Masterdude

okay, i think i know how to solve this problem (for me at least). So this only applies for people who have K9. All you need to do is to fully uninstall K9 then you have your minecraft back to its normal self. If you set it to monitoring or anything, it still crashes the game because it is some issues that K9 and minecraft have. You need to fully uninstall K9 or your game will be crashing.

it also happens in multiplayer, when you are on a big server players glitch out and they look like they are flying or sank into the block

I have the exact same problem on a dc7800 that runs windows 7 64bit. I also have a gx270 that runs windows xp 32bit and plays minecraft perfectly. Every time i try to go on a minecraft with my dc7800 it will give me this exact error after 5-10 seconds. I tried older versions of java and tried java 32bit but nothing has worked. I have comodo firewall, antivirus and k9. Even if I shut all these things down, I still get this same error. It only happens on servers not in single player. I play minecraft 1.5.2 and I really want this bug to be fixed so I can play minecraft with my new computer. Thanks, I hope this is fixed soon.