Edited with pastebin:
http://pastebin.com/KAFTaW1t

Did you modify your seed json at all?

no, just dragged your mod into mods folder and started minecraft.

Could I get a copy of your seed json?

sure if i knew where to find it :D

../config/ResourcefulCrops/Seeds.json

its empty...

Well then, that's a problem...

For now, you can copy all this into it to (hopefully) avoid the crash.

http://tehnut.info/share/CDp8ZuaRHJ.txt

ok it worked, thx

i have the same exact crash

Just to be clear, the file is there, it's just empty, correct?

ok dude, i dont know what to say, sorry if i wasted your time.

I meant it more as a "This is weird, why would it happen to others and not me?"

I'm unable to reproduce this both indev and in a game environment.

Alright, so did some more testing. It does not happen alone. Only with other mods. That is why I couldn't reproduce. Hum...

To explain what happened:

Other mods are doing stupid shit. They query OreDictionary.getOres(entry) without checking OreDictionary.doesOreNameExist(entry) first. The latter checks if the entry exists without adding anything to the dictionary. The former checks if it exists and if not, it will add an entry with an empty list.

By querying OreDictionary.getOres(entry) blindly, it spams the OreDict with values that shouldn't be there.