I didn´t know that you couldn´t spawn the wither in the overworld. A Message came and I broke the skulls but they didn´t drop. The Soul Sand dropped. PS: I placed the Wither Skulls against the wall on top of the soulsand.
That is odd. I will test next time I come online and post back here with what I find out.[DOUBLEPOST=1418107471,1418016421][/DOUBLEPOST]So testing this in the overworld results in a chat message saying "MYM.wither wither can only be spawned in the nether" upon further review, this is to stop random withers from flying around the overworld and killing players. Also stops griefing as withers can break blocks. Sorry.
