--- /home/matt/mc-dev-private//net/minecraft/server/EntityGhast.java	2015-02-26 22:40:22.547608140 +0000
+++ src/main/java/net/minecraft/server/EntityGhast.java	2015-02-26 22:40:22.547608140 +0000
@@ -162,7 +162,9 @@
                     world.a((EntityHuman) null, 1008, new BlockPosition(this.b), 0);
                     EntityLargeFireball entitylargefireball = new EntityLargeFireball(world, this.b, d2, d3, d4);
 
-                    entitylargefireball.yield = this.b.cf();
+
+                    // CraftBukkit - set bukkitYield when setting explosionpower
+                    entitylargefireball.bukkitYield = entitylargefireball.yield = this.b.cf();
                     entitylargefireball.locX = this.b.locX + vec3d.a * d1;
                     entitylargefireball.locY = this.b.locY + (double) (this.b.length / 2.0F) + 0.5D;
                     entitylargefireball.locZ = this.b.locZ + vec3d.c * d1;