Stuck at building terrain (Mindcrack pack)

[zedubs]

Hi, recently everytime I make/join a single player world on my mindcrack pack, I tend to get stuck at building terrain to no end. Here's the logs:

http://pastebin.com/PbGPgEjC

 

[Velotican]

You're probably using Optifine. Update it. C3 is the latest stable build. Also update your Forge whilst you're there as that'll fix a bug updating your Optifine causes.