0.o Ender IO ids conflict with the Ender IO mod ids already set and also OpenBlocks

Caught exception from OpenBlocks
java.lang.IllegalStateException: OpenBlocks tried to register a block for ID: 424 but it was in use

and Magical Crops

431: enderio.blockHyperCube from EnderIO - BlockOreEssenceNether from magicalcrops

Block IDs? Sorry mate, we no longer support the old versions for Minecraft 1.6/1.5.

oh right facepalm

i forgot

However, I am quite sure there's a config file for the block IDs. So you have to find free IDs for all the mods. That's how it worked in those ancient times ;)