I have noticed, after switching to build 1337, a sharp increase in lag after 15-20 minutes of playtime. I got some plugins like NoLagg to check the entity counts. I noticed that the section that is called items under "/nolagg monitor" seems to increase by 100-200 per second. When I find that there is a lot of lag and I turn this command on to find the items count is around 10,000-20,000! I remove all entities with World edit but they just keep respawning. I used MCEdit to find where all the entities were and found them all to be the seed item from long grass. A lot of them were underground and in water. They seem to be in random patches around the map. Is anyone else having this issue?