A ton of lag

Put the summary of the bug you're having here

What I expected to happen was for Minecraft 1.6 was going to be clear of lag completly.

What actually happened was Minecraft 1.6 and MInecraft 1.5.2 runs out of memory after 5 minute.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. Fix it
3. Put it Out