I have a fairly low-end PC so it would be difficult for me to record my screen, but I can share some steps to recreate:
1. Isolate a naturally spawning endermen that has picked up a block with a minecart or boat
2. move away at least 128 blocks
3. The endermen will remain there, and will no longer count towards the mob cap, allowing more endermen to spawn.
This is only prominent in warped forest biomes as they spawn frequently and there is an abundance of blocks they can pick up and does not occur elsewhere.
Ahh, thanks! Passengers makes more sense anyway.
I see... I am not sure what to think on that one. Thank you Herr Dinnerbone.
Confirmed on 1.4.5, Vista 32bit SP3, Java 1.7.0_09 32-bit.
Thanks Sopa, your fix worked, minecraft is running great again!! Reposting link here:
http://www.minecraftforum.net/topic/892045-sound-lagstutter-fix/
This is the stage file which creates lag when flying and walking around inside the area surrounded by running water.
Installing the Minecraft Java Version 1.19 update appears to have resolved this issue.