When is the next update planned?
You now your crash has nothing to do with seasons at all. It's Computronics and Gregtech causing the issue. They are missing some classes. Try to remove Computronics and retry.
Realy nice Pack. Thank you for making such a awesome Texturepack. Could you please add mor Models and Textures for Redstone, because when I place one on top of a block and one on the Block next down to it, it show the normal textures from Minecraft.