Not sure if this is related to #22 or not, but when The Agricultural Revolution Mod is installed, I get this spammed in my log, without a crash, and the world won't load: http://pastebin.com/9Js44rsc

I've been seeing slowdowns and freezes with mods such as WTF's Expeditions and Krikke's Mod when used together with Streams, but it's difficult to reproduce consistently. It seems you're using those two mods - could you try removing them and let me know if the problem persists? Thanks!

Here is a crash report: http://pastebin.com/DCStRUVi
Mods I think might be involved:
Battletowers v1.10.2 (Make sure to unzip the file after download)
How 'Bout That Furniture v1.2.1
Mantle v0.1.8.6 v1.1.3
Mobhunter v0.1.8.6
RTG v4.1.2.1
Taiga v1.2.2
TConstruct v2.6.1
Expedition v1.3 Beta 8

I am getting this problem again, but with out agricultural revolution or Kirkke's mod. I am currently trying to figure out which mods are causing this. I am also using farseek 2.0 and Streams 0.3 with 1.10.2.

Thanks WenXin20 for the update. I mentioned Expedition as potentially problematic earlier - could you try again without that mod and let me know if the stall/crash still happens? Thanks!

Yes, I can do that.
In my first test, I removed Expedition, I started to load a new world using the seed -8734977455354033659 and the Realistic Terrain Gen World Option. At first, it appeared to be getting closer to loading the world, but then it just crashed instead. Crash Log

In my second test, I readded Expedition, but this time I removed Mobhunter using the same seed and the Realistic Terrain Gen World Option, and the world loaded just fine.
Here is a cool picture with a mountain and a stream, so it appears to have loaded fine:

Wow great picture, thanks!

I wasn't able to reproduce your latest crash but looking at the log it does seem like either MobHunter alone, or MobHunter + Battletowers is at fault here. I think what's happening is basically that a block update from Battletowers is causing some kind of MobHunter plant derived from BlockBush to be destroyed and getting a null pointer exception from having no registered item for itself to drop.

So please let me know if you encounter other Streams crashes that can't be fixed without removing other mods; otherwise I'll go ahead and close the issue. Thanks!

Prehaps try adding Underground Biomes Construct. It seems like maybe Mobhunter with Underground Biomes Construct causes it to crash. But disabling battletowers still has a crash afterwards.