As some of you may have noticed I repeatedly join and leave really quickly over and over sometimes, this is because I keep getting the "recv failed" error, when this error occurs it is like a reverse chunk error where only the chunk I am currently on and the 6-7 around it load, sometimes i just join in and start an infinite fall to the void till it throws me out. I cannot chat while this is happening to me either. If anyone can offer any assistance with this, it would be greatly appreciated.

Re-download minecraft user files?

I've done that 30+ times

I could try to delete your user.dat file, you would lose your inventory and current location.

no, this happens for every server

Oh, its client side then. If you tried to reinstall your minecraft already... I dont know what else to suggest you. Assuming the problem is not from your java version.

You could probally get help on the minecraft forums or on MIRC on the minecraft channel