when using this command
/setblock ~ ~1 ~ minecraft:mob_spawner 0 replace {EntityId:VillagerGolem}
it puts the pig mob_spawner instead of the mob you put.
This did work before now in the snapshots now it doesn't and needs to be fixed. also includes other mobs when using this command
Format changed. See http://www.minecraftforum.net/forums/minecraft-discussion/redstone-discussion-and/command-blocks/2488148-1-9-nbt-changes-and-additions