diff --git a/src/main/java/com/sk89q/worldedit/EditSession.java b/src/main/java/com/sk89q/worldedit/EditSession.java
index 5562eedea..82ebf74ef 100644
--- a/src/main/java/com/sk89q/worldedit/EditSession.java
+++ b/src/main/java/com/sk89q/worldedit/EditSession.java
@@ -367,24 +367,19 @@ public int getHighestTerrainBlock(int x, int z, int minY, int maxY, boolean natu
      * @param level the level
      * @return whether the block changed
      */
-    public boolean setBlock(Vector position, BaseBlock block, boolean notifyAdjacent, Level level) throws WorldEditException {
+    public boolean setBlock(Vector position, BaseBlock block, Level level) throws WorldEditException {
         switch (level) {
             case NORMAL:
-                return bypassNone.setBlock(position, block, notifyAdjacent);
+                return bypassNone.setBlock(position, block);
             case NO_HISTORY_REORDER:
-                return bypassHistory.setBlock(position, block, notifyAdjacent);
+                return bypassHistory.setBlock(position, block);
             case NO_HISTORY:
-                return bypassReorderHistory.setBlock(position, block, notifyAdjacent);
+                return bypassReorderHistory.setBlock(position, block);
         }
 
         throw new RuntimeException("New enum entry added that is unhandled here");
     }
 
-    @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
-        return setBlock(location, block, notifyAdjacent, Level.NORMAL);
-    }
-
     /**
      * Set a block, bypassing both history and block re-ordering.
      *
@@ -396,7 +391,7 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
     @Deprecated
     public boolean rawSetBlock(Vector position, BaseBlock block) {
         try {
-            return setBlock(position, block, true, Level.NO_HISTORY_REORDER);
+            return setBlock(position, block, Level.NO_HISTORY_REORDER);
         } catch (WorldEditException e) {
             throw new RuntimeException("Unexpected exception", e);
         }
@@ -413,23 +408,16 @@ public boolean rawSetBlock(Vector position, BaseBlock block) {
     @Deprecated
     public boolean smartSetBlock(Vector position, BaseBlock block) {
         try {
-            return setBlock(position, block, true, Level.NO_HISTORY);
+            return setBlock(position, block, Level.NO_HISTORY);
         } catch (WorldEditException e) {
             throw new RuntimeException("Unexpected exception", e);
         }
     }
 
-    /**
-     * Sets the block at a position, subject to both history and block re-ordering.
-     *
-     * @param position the position
-     * @param block the block
-     * @return Whether the block changed -- not entirely dependable
-     * @throws MaxChangedBlocksException thrown if too many blocks are changed
-     */
+    @Override
     public boolean setBlock(Vector position, BaseBlock block) throws MaxChangedBlocksException {
         try {
-            return setBlock(position, block, true, Level.NORMAL);
+            return setBlock(position, block, Level.NORMAL);
         } catch (MaxChangedBlocksException e) {
             throw e;
         } catch (WorldEditException e) {
diff --git a/src/main/java/com/sk89q/worldedit/LocalWorld.java b/src/main/java/com/sk89q/worldedit/LocalWorld.java
index e5ed7edfb..433ec7fd0 100644
--- a/src/main/java/com/sk89q/worldedit/LocalWorld.java
+++ b/src/main/java/com/sk89q/worldedit/LocalWorld.java
@@ -526,8 +526,8 @@ public int killEntities(LocalEntity... entities) {
     }
 
     @Override
-    public boolean setBlock(Vector pt, BaseBlock block, boolean notifyAdjacent) {
-        return setBlock(pt, (Block) block, notifyAdjacent);
+    public boolean setBlock(Vector pt, BaseBlock block) {
+        return setBlock(pt, block, true);
     }
     
     @Override
diff --git a/src/main/java/com/sk89q/worldedit/extent/BlockBagExtent.java b/src/main/java/com/sk89q/worldedit/extent/BlockBagExtent.java
index 734e6883c..3e6122957 100644
--- a/src/main/java/com/sk89q/worldedit/extent/BlockBagExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/BlockBagExtent.java
@@ -87,7 +87,7 @@ public Map<Integer, Integer> popMissing() {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         if (blockBag != null) {
             final int type = block.getType();
             final int existing = world.getBlockType(location);
@@ -115,6 +115,6 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
             }
         }
 
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/BlockChangeLimiter.java b/src/main/java/com/sk89q/worldedit/extent/BlockChangeLimiter.java
index 618ec535b..9c7ecf331 100644
--- a/src/main/java/com/sk89q/worldedit/extent/BlockChangeLimiter.java
+++ b/src/main/java/com/sk89q/worldedit/extent/BlockChangeLimiter.java
@@ -75,13 +75,13 @@ public int getCount() {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         if (limit >= 0) {
             if (count >= limit) {
                 throw new MaxChangedBlocksException(limit);
             }
             count++;
         }
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/BlockQuirkExtent.java b/src/main/java/com/sk89q/worldedit/extent/BlockQuirkExtent.java
index 961e976f6..5f9bd6465 100644
--- a/src/main/java/com/sk89q/worldedit/extent/BlockQuirkExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/BlockQuirkExtent.java
@@ -49,7 +49,7 @@ public BlockQuirkExtent(Extent extent, LocalWorld world) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         final int existing = world.getBlockType(location);
 
         if (BlockType.isContainerBlock(existing)) {
@@ -58,7 +58,7 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
             world.setBlockType(location, BlockID.AIR); // Ice turns until water so this has to be done first
         }
 
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/ChangeSetExtent.java b/src/main/java/com/sk89q/worldedit/extent/ChangeSetExtent.java
index 5f5a9534c..189c93207 100644
--- a/src/main/java/com/sk89q/worldedit/extent/ChangeSetExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/ChangeSetExtent.java
@@ -47,10 +47,10 @@ public ChangeSetExtent(Extent extent, ChangeSet changeSet) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         BaseBlock previous = getBlock(location);
         changeSet.add(new BlockChange(location.toBlockVector(), previous, block));
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/ChunkLoadingExtent.java b/src/main/java/com/sk89q/worldedit/extent/ChunkLoadingExtent.java
index b1b41e44c..36e0c0eb1 100644
--- a/src/main/java/com/sk89q/worldedit/extent/ChunkLoadingExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/ChunkLoadingExtent.java
@@ -59,8 +59,8 @@ public ChunkLoadingExtent(Extent extent, LocalWorld world) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         world.checkLoadedChunk(location);
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/DataValidatorExtent.java b/src/main/java/com/sk89q/worldedit/extent/DataValidatorExtent.java
index 8a4ba1217..1402ed712 100644
--- a/src/main/java/com/sk89q/worldedit/extent/DataValidatorExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/DataValidatorExtent.java
@@ -46,7 +46,7 @@ public DataValidatorExtent(Extent extent, LocalWorld world) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         final int y = location.getBlockY();
         final int type = block.getType();
         if (y < 0 || y > world.getMaxY()) {
@@ -58,6 +58,6 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
             return false;
         }
 
-        return super.setBlock(location, block, notifyAdjacent);
+        return super.setBlock(location, block);
     }
 }
diff --git a/src/main/java/com/sk89q/worldedit/extent/Extent.java b/src/main/java/com/sk89q/worldedit/extent/Extent.java
index 066a62ada..999ca6b20 100644
--- a/src/main/java/com/sk89q/worldedit/extent/Extent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/Extent.java
@@ -23,6 +23,7 @@
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.function.operation.Operation;
+import com.sk89q.worldedit.function.pattern.Pattern;
 
 import javax.annotation.Nullable;
 
@@ -33,51 +34,58 @@
 public interface Extent {
 
     /**
-     * Get a copy of the block at the given location. May return null if the location
-     * given is out of bounds. The returned block must not be tied to any real block
-     * in the world, so changes to the returned {@link BaseBlock} have no effect until
-     * {@link #setBlock(Vector, BaseBlock, boolean)} is called.
+     * Get a snapshot of the block at the given location.
+     * </p>
+     * If the given position is out of the bounds of the extent, then the behavior
+     * is undefined (an air block could be returned). However, <code>null</code>
+     * should <strong>not</strong> be returned.
+     * </p>
+     * The returned block is mutable and is a snapshot of the block at the time
+     * of call. It has no position attached to it, so it could be reused in
+     * {@link Pattern}s and so on.
+     * </p>
+     * Calls to this method can actually be quite expensive, so cache results
+     * whenever it is possible, while being aware of the mutability aspect.
+     * The cost, however, depends on the implementation and particular extent.
      *
-     * @param location location of the block
+     * @param position position of the block
      * @return the block, or null if the block does not exist
      */
-    BaseBlock getBlock(Vector location);
+    BaseBlock getBlock(Vector position);
 
     /**
      * Get the block ID at the given location.
      *
-     * @param location location of the block
+     * @param position position of the block
      * @return the block ID
      */
-    int getBlockType(Vector location);
+    int getBlockType(Vector position);
 
     /**
      * Get the data value of the block at the given location.
      *
-     * @param location the location of the block
+     * @param position position of the block
      * @return the block data value
      */
-    int getBlockData(Vector location);
+    int getBlockData(Vector position);
 
     /**
      * Change the block at the given location to the given block. The operation may
      * not tie the given {@link BaseBlock} to the world, so future changes to the
      * {@link BaseBlock} do not affect the world until this method is called again.
+     * </p>
+     * The return value of this method indicates whether the change was probably
+     * successful. It may not be successful if, for example, the location is out
+     * of the bounds of the extent. It may be unsuccessful if the block passed
+     * is the same as the one in the world. However, the return value is only an
+     * estimation and it may be incorrect, but it could be used to count, for
+     * example, the approximate number of changes.
      *
-     * <p>The return value of this method indicates whether the change "went through," as
-     * in the block was changed in the world in any way. If the new block is no different
-     * than the block already at the position in the world, 'false' would be returned.
-     * If the position is invalid (out of bounds, for example), then nothing should
-     * occur and 'false' should be returned. If possible, the return value should be
-     * accurate as possible, but implementations may choose to not provide an accurate
-     * value if it is not possible to know.</p>
-     *
-     * @param location location of the block
+     * @param position position of the block
      * @param block block to set
-     * @param notifyAdjacent true to notify adjacent blocks of changes
      * @return true if the block was successfully set (return value may not be accurate)
      */
-    boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException;
+    boolean setBlock(Vector position, BaseBlock block) throws WorldEditException;
 
     /**
      * Return an {@link Operation} that should be called to tie up loose ends
diff --git a/src/main/java/com/sk89q/worldedit/extent/ExtentDelegate.java b/src/main/java/com/sk89q/worldedit/extent/ExtentDelegate.java
index 8a23b1209..17b5801bd 100644
--- a/src/main/java/com/sk89q/worldedit/extent/ExtentDelegate.java
+++ b/src/main/java/com/sk89q/worldedit/extent/ExtentDelegate.java
@@ -71,8 +71,8 @@ public int getBlockData(Vector location) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
-        return extent.setBlock(location, block, notifyAdjacent);
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
+        return extent.setBlock(location, block);
     }
 
     protected Operation commitBefore() {
diff --git a/src/main/java/com/sk89q/worldedit/extent/FastModeExtent.java b/src/main/java/com/sk89q/worldedit/extent/FastModeExtent.java
index 1a2e7cada..750b26b3f 100644
--- a/src/main/java/com/sk89q/worldedit/extent/FastModeExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/FastModeExtent.java
@@ -81,9 +81,9 @@ public void setEnabled(boolean enabled) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         dirtyChunks.add(new BlockVector2D(location.getBlockX() >> 4, location.getBlockZ() >> 4));
-        return super.setBlock(location, block, notifyAdjacent || enabled);
+        return world.setBlock(location, block, !enabled);
     }
 
     @Override
diff --git a/src/main/java/com/sk89q/worldedit/extent/ForgetfulExtentBuffer.java b/src/main/java/com/sk89q/worldedit/extent/ForgetfulExtentBuffer.java
index fe1322c2e..ce8df1606 100644
--- a/src/main/java/com/sk89q/worldedit/extent/ForgetfulExtentBuffer.java
+++ b/src/main/java/com/sk89q/worldedit/extent/ForgetfulExtentBuffer.java
@@ -77,7 +77,7 @@ public ForgetfulExtentBuffer(Extent delegate, Mask mask) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         // Update minimum
         if (min == null) {
             min = location;
@@ -97,7 +97,7 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
             buffer.put(blockVector, block);
             return true;
         } else {
-            return getExtent().setBlock(location, block, notifyAdjacent);
+            return getExtent().setBlock(location, block);
         }
     }
 
diff --git a/src/main/java/com/sk89q/worldedit/extent/MaskingExtent.java b/src/main/java/com/sk89q/worldedit/extent/MaskingExtent.java
index 1571258f2..5eb4e1d08 100644
--- a/src/main/java/com/sk89q/worldedit/extent/MaskingExtent.java
+++ b/src/main/java/com/sk89q/worldedit/extent/MaskingExtent.java
@@ -62,9 +62,9 @@ public void setMask(Mask mask) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         if (mask.test(location)) {
-            return super.setBlock(location, block, notifyAdjacent);
+            return super.setBlock(location, block);
         } else {
             return false;
         }
diff --git a/src/main/java/com/sk89q/worldedit/extent/reorder/SimpleBlockReorder.java b/src/main/java/com/sk89q/worldedit/extent/reorder/SimpleBlockReorder.java
index e3d7fd266..18f9a919c 100644
--- a/src/main/java/com/sk89q/worldedit/extent/reorder/SimpleBlockReorder.java
+++ b/src/main/java/com/sk89q/worldedit/extent/reorder/SimpleBlockReorder.java
@@ -82,9 +82,9 @@ public void setEnabled(boolean enabled) {
     }
 
     @Override
-    public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent) throws WorldEditException {
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
         if (!enabled) {
-            return super.setBlock(location, block, notifyAdjacent);
+            return super.setBlock(location, block);
         }
 
         if (BlockType.shouldPlaceLast(block.getType())) {
@@ -97,8 +97,8 @@ public boolean setBlock(Vector location, BaseBlock block, boolean notifyAdjacent
             return !(getBlockType(location) == block.getType() && getBlockData(location) == block.getData());
         } else if (BlockType.shouldPlaceLast(getBlockType(location))) {
             // Destroy torches, etc. first
-            super.setBlock(location, new BaseBlock(BlockID.AIR), notifyAdjacent);
-            return super.setBlock(location, block, notifyAdjacent);
+            super.setBlock(location, new BaseBlock(BlockID.AIR));
+            return super.setBlock(location, block);
         } else {
             stage1.put(location.toBlockVector(), block);
             return !(getBlockType(location) == block.getType() && getBlockData(location) == block.getData());
@@ -191,7 +191,7 @@ public Operation resume() throws WorldEditException {
                 }
 
                 for (BlockVector pt : walked) {
-                    extent.setBlock(pt, blockTypes.get(pt), true);
+                    extent.setBlock(pt, blockTypes.get(pt));
                     blocks.remove(pt);
                 }
             }
diff --git a/src/main/java/com/sk89q/worldedit/function/block/BlockReplace.java b/src/main/java/com/sk89q/worldedit/function/block/BlockReplace.java
index c8a5dbedc..d05a7df7c 100644
--- a/src/main/java/com/sk89q/worldedit/function/block/BlockReplace.java
+++ b/src/main/java/com/sk89q/worldedit/function/block/BlockReplace.java
@@ -50,7 +50,7 @@ public BlockReplace(Extent extent, Pattern pattern) {
 
     @Override
     public boolean apply(Vector position) throws WorldEditException {
-        return extent.setBlock(position, pattern.apply(position), true);
+        return extent.setBlock(position, pattern.apply(position));
     }
 
 }
\ No newline at end of file
diff --git a/src/main/java/com/sk89q/worldedit/function/block/ExtentBlockCopy.java b/src/main/java/com/sk89q/worldedit/function/block/ExtentBlockCopy.java
index af28924a9..4632b387c 100644
--- a/src/main/java/com/sk89q/worldedit/function/block/ExtentBlockCopy.java
+++ b/src/main/java/com/sk89q/worldedit/function/block/ExtentBlockCopy.java
@@ -64,7 +64,7 @@ public ExtentBlockCopy(Extent source, Vector from, Extent destination, Vector to
     @Override
     public boolean apply(Vector position) throws WorldEditException {
         BaseBlock block = source.getBlock(position);
-        return destination.setBlock(transform.apply(position.subtract(from)).add(to), block, true);
+        return destination.setBlock(transform.apply(position.subtract(from)).add(to), block);
     }
 
 }
diff --git a/src/main/java/com/sk89q/worldedit/function/visitor/BlockMapEntryVisitor.java b/src/main/java/com/sk89q/worldedit/function/visitor/BlockMapEntryVisitor.java
index 08324b118..dee6106ae 100644
--- a/src/main/java/com/sk89q/worldedit/function/visitor/BlockMapEntryVisitor.java
+++ b/src/main/java/com/sk89q/worldedit/function/visitor/BlockMapEntryVisitor.java
@@ -46,7 +46,7 @@ public BlockMapEntryVisitor(Extent extent, Iterator<Map.Entry<BlockVector, BaseB
     public Operation resume() throws WorldEditException {
         while (iterator.hasNext()) {
             Map.Entry<BlockVector, BaseBlock> entry = iterator.next();
-            extent.setBlock(entry.getKey(), entry.getValue(), true);
+            extent.setBlock(entry.getKey(), entry.getValue());
         }
 
         return null;
diff --git a/src/main/java/com/sk89q/worldedit/history/change/BlockChange.java b/src/main/java/com/sk89q/worldedit/history/change/BlockChange.java
index 91d82acda..415d7d669 100644
--- a/src/main/java/com/sk89q/worldedit/history/change/BlockChange.java
+++ b/src/main/java/com/sk89q/worldedit/history/change/BlockChange.java
@@ -85,12 +85,12 @@ public BaseBlock getCurrent() {
 
     @Override
     public void undo(UndoContext context) throws WorldEditException {
-        checkNotNull(context.getExtent()).setBlock(position, previous, true);
+        checkNotNull(context.getExtent()).setBlock(position, previous);
     }
 
     @Override
     public void redo(UndoContext context) throws WorldEditException {
-        checkNotNull(context.getExtent()).setBlock(position, current, true);
+        checkNotNull(context.getExtent()).setBlock(position, current);
     }
 
 }