Solved. For anyone else who's having the same problem, all I did was go into /technicssp/mods/thaumcraft2.1.1.zip and deleted the "ic2" folder (along with everything else accidentally, oops. good thing I don't use thaumcraft anyway ) and it loaded just fine after that.
Launcher Version: 1.0.1.3
Operating System: Ubuntu 12.04 64-bit
Java Version: JRE version 7 Update 5
Antivirus Program: None at this time
Description of Problem:
Makes it to Mojang logo, then crashes with an error report.
Error Messages:
[02:15:16] [sEVERE] THROW
[02:15:26] [sEVERE] Exception in thread "Minecraft main thread"
[02:15:26] [sEVERE] java.lang.ExceptionInInitializerError
[02:15:26] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:394)
[02:15:26] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:732)
[02:15:26] [sEVERE] at java.lang.Thread.run(Thread.java:679)
[02:15:26] [sEVERE] Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodError: ic2.api.CropCard.registerBaseSeed(Laan;IIIII)Z
[02:15:26] [sEVERE] at ModLoader.init(ModLoader.java:918)
[02:15:26] [sEVERE] at ModLoader.addAllRenderers(ModLoader.java:189)
[02:15:26] [sEVERE] at ahu.<init>(ahu.java:77)
[02:15:26] [sEVERE] at ahu.<clinit>(ahu.java:8)
[02:15:26] [sEVERE] ... 3 more
[02:15:26] [sEVERE] Caused by: java.lang.NoSuchMethodError: ic2.api.CropCard.registerBaseSeed(Laan;IIIII)Z
[02:15:26] [sEVERE] at ic2.common.IC2Crops.registerBaseSeeds(IC2Crops.java:82)
[02:15:26] [sEVERE] at ic2.common.IC2Crops.init(IC2Crops.java:43)
[02:15:26] [sEVERE] at mod_IC2.load(mod_IC2.java:522)
[02:15:26] [sEVERE] at ModLoader.init(ModLoader.java:891)
[02:15:26] [sEVERE] ... 6 more
Error Log:
[02:15:16] [sEVERE] THROW
[02:15:26] [sEVERE] Exception in thread "Minecraft main thread"
[02:15:26] [sEVERE] java.lang.ExceptionInInitializerError
[02:15:26] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:394)
[02:15:26] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:732)
[02:15:26] [sEVERE] at java.lang.Thread.run(Thread.java:679)
[02:15:26] [sEVERE] Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodError: ic2.api.CropCard.registerBaseSeed(Laan;IIIII)Z
[02:15:26] [sEVERE] at ModLoader.init(ModLoader.java:918)
[02:15:26] [sEVERE] at ModLoader.addAllRenderers(ModLoader.java:189)
[02:15:26] [sEVERE] at ahu.<init>(ahu.java:77)
[02:15:26] [sEVERE] at ahu.<clinit>(ahu.java:8)
[02:15:26] [sEVERE] ... 3 more
[02:15:26] [sEVERE] Caused by: java.lang.NoSuchMethodError: ic2.api.CropCard.registerBaseSeed(Laan;IIIII)Z
[02:15:26] [sEVERE] at ic2.common.IC2Crops.registerBaseSeeds(IC2Crops.java:82)
[02:15:26] [sEVERE] at ic2.common.IC2Crops.init(IC2Crops.java:43)
[02:15:26] [sEVERE] at mod_IC2.load(mod_IC2.java:522)
[02:15:26] [sEVERE] at ModLoader.init(ModLoader.java:891)
[02:15:26] [sEVERE] ... 6 more