Probably fixed getLoadedChunks()

src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -73,11 +73,12 @@ public class CraftWorld implements World {
     }
 
     public Chunk[] getLoadedChunks() {
-        net.minecraft.server.Chunk[] chunks = (net.minecraft.server.Chunk[])provider.e.values().toArray();
+        Object[] chunks = provider.e.values().toArray();
         org.bukkit.Chunk[] craftChunks = new CraftChunk[chunks.length];
 
         for (int i = 0; i < chunks.length; i++) {
-            craftChunks[i] = chunks[i].bukkitChunk;
+            net.minecraft.server.Chunk chunk = (net.minecraft.server.Chunk)chunks[i];
+            craftChunks[i] = chunk.bukkitChunk;
         }
 
         return craftChunks;