--- a/net/minecraft/server/EntityPainting.java
+++ b/net/minecraft/server/EntityPainting.java
@@ -9,6 +9,7 @@
 
     public EntityPainting(World world) {
         super(world);
+        this.art = EnumArt.values()[this.random.nextInt(EnumArt.values().length)]; // CraftBukkit - generate a non-null painting
     }
 
     public EntityPainting(World world, BlockPosition blockposition, EnumDirection enumdirection) {