diff --git a/src/com/sk89q/worldedit/CuboidClipboard.java b/src/com/sk89q/worldedit/CuboidClipboard.java
index eb7354c68..ac7b7cf99 100644
--- a/src/com/sk89q/worldedit/CuboidClipboard.java
+++ b/src/com/sk89q/worldedit/CuboidClipboard.java
@@ -123,6 +123,8 @@ public class CuboidClipboard {
         if (angle % 90 != 0) { // Can only rotate 90 degrees at the moment
             return;
         }
+        boolean reverse = angle < 0;
+        int numRotations = (int)Math.floor(angle / 90.0);
 
         int width = getWidth();
         int length = getLength();
@@ -142,7 +144,18 @@ public class CuboidClipboard {
                 int newX = v.getBlockX();
                 int newZ = v.getBlockZ();
                 for (int y = 0; y < height; y++) {
-                    newData[shiftX + newX][y][shiftZ + newZ] = data[x][y][z];
+                    BaseBlock block = data[x][y][z];
+                    newData[shiftX + newX][y][shiftZ + newZ] = block;
+                    
+                    if (reverse) {
+                        for (int i = 0; i < numRotations; i++) {
+                            block.rotate90Reverse();
+                        }
+                    } else {
+                        for (int i = 0; i < numRotations; i++) {
+                            block.rotate90();
+                        }
+                    }
                 }
             }
         }
@@ -171,6 +184,7 @@ public class CuboidClipboard {
                 for (int z = 0; z < length; z++) {
                     for (int y = 0; y < height; y++) {
                         BaseBlock old = data[xs][y][z];
+                        old.flip();
                         data[xs][y][z] = data[width - xs - 1][y][z];
                         data[width - xs - 1][y][z] = old;
                     }
@@ -182,6 +196,7 @@ public class CuboidClipboard {
                 for (int x = 0; x < width; x++) {
                     for (int y = 0; y < height; y++) {
                         BaseBlock old = data[x][y][zs];
+                        old.flip();
                         data[x][y][zs] = data[x][y][length - zs - 1];
                         data[x][y][length - zs - 1] = old;
                     }
diff --git a/src/com/sk89q/worldedit/blocks/BaseBlock.java b/src/com/sk89q/worldedit/blocks/BaseBlock.java
index 11c15a124..f614828af 100644
--- a/src/com/sk89q/worldedit/blocks/BaseBlock.java
+++ b/src/com/sk89q/worldedit/blocks/BaseBlock.java
@@ -19,6 +19,8 @@
 
 package com.sk89q.worldedit.blocks;
 
+import com.sk89q.worldedit.data.BlockData;
+
 /**
  * Represents a block.
  *
@@ -89,4 +91,25 @@ public class BaseBlock {
     public boolean isAir() {
         return type == 0;
     }
+    
+    /**
+     * Rotate this block 90 degrees.
+     */
+    public void rotate90() {
+        data = (char)BlockData.rotate90(type, data);
+    }
+    
+    /**
+     * Rotate this block -90 degrees.
+     */
+    public void rotate90Reverse() {
+        data = (char)BlockData.rotate90Reverse(type, data);
+    }
+    
+    /**
+     * Flip this block.
+     */
+    public void flip() {
+        data = (char)BlockData.flip(type, data);
+    }
 }
diff --git a/src/com/sk89q/worldedit/data/BlockData.java b/src/com/sk89q/worldedit/data/BlockData.java
new file mode 100644
index 000000000..5f3684169
--- /dev/null
+++ b/src/com/sk89q/worldedit/data/BlockData.java
@@ -0,0 +1,232 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.data;
+
+import com.sk89q.worldedit.blocks.BlockID;
+
+/**
+ * Block data related classes.
+ *
+ * @author sk89q
+ */
+public final class BlockData {
+    /**
+     * Rotate a block's data value 90 degrees (north->east->south->west->north);
+     * 
+     * @param type
+     * @param data
+     * @return
+     */
+    public static int rotate90(int type, int data) {
+        if (type == BlockID.TORCH
+                || type == BlockID.REDSTONE_TORCH_OFF
+                || type == BlockID.REDSTONE_TORCH_ON) {
+            switch (data) {
+                case 1: return 3;
+                case 2: return 4;
+                case 3: return 2;
+                case 4: return 1;
+            }
+        } else if (type == BlockID.MINECART_TRACKS) {
+            switch (data) {
+                case 0: return 1;
+                case 1: return 0;
+                case 2: return 5;
+                case 3: return 4;
+                case 4: return 2;
+                case 5: return 3;
+                case 6: return 7;
+                case 7: return 8;
+                case 8: return 9;
+                case 9: return 6;
+            }
+        } else if (type == BlockID.WOODEN_STAIRS
+                || type == BlockID.COBBLESTONE_STAIRS) {
+            switch (data) {
+                case 0: return 2;
+                case 1: return 3;
+                case 2: return 1;
+                case 3: return 0;
+            }
+        } else if (type == BlockID.LEVER) {
+            int thrown = data & 0x8;
+            int withoutThrown = data ^ 0x8;
+            switch (withoutThrown) {
+                case 1: return 3 | thrown;
+                case 2: return 4 | thrown;
+                case 3: return 2 | thrown;
+                case 4: return 1 | thrown;
+            }
+        } else if (type == BlockID.WOODEN_DOOR
+                || type == BlockID.IRON_DOOR) {
+            int topHalf = data & 0x8;
+            int swung = data & 0x4;
+            int withoutFlags = data ^ (0x8 | 0x4);
+            switch (withoutFlags) {
+                case 0: return 1 | topHalf | swung;
+                case 1: return 2 | topHalf | swung;
+                case 2: return 3 | topHalf | swung;
+                case 3: return 0 | topHalf | swung;
+            }
+        } else if (type == BlockID.STONE_BUTTON) {
+            int thrown = data & 0x8;
+            int withoutThrown = data ^ 0x8;
+            switch (withoutThrown) {
+                case 1: return 3 | thrown;
+                case 2: return 4 | thrown;
+                case 3: return 2 | thrown;
+                case 4: return 1 | thrown;
+            }
+        } else if (type == BlockID.SIGN_POST) {
+            return (data + 4) % 16;
+        } else if (type == BlockID.LADDER
+                || type == BlockID.WALL_SIGN
+                || type == BlockID.FURNACE
+                || type == BlockID.BURNING_FURNACE
+                || type == BlockID.DISPENSER) {
+            switch (data) {
+                case 2: return 5;
+                case 3: return 4;
+                case 4: return 2;
+                case 5: return 3;
+            }
+        } else if (type == BlockID.PUMPKIN
+                || type == BlockID.JACKOLANTERN) {
+            switch (data) {
+                case 0: return 1;
+                case 1: return 2;
+                case 2: return 3;
+                case 3: return 0;
+            }
+        }
+        
+        return data;
+    }
+
+    /**
+     * Rotate a block's data value -90 degrees (north<-east<-south<-west<-north);
+     * 
+     * @param type
+     * @param data
+     * @return
+     */
+    public static int rotate90Reverse(int type, int data) {
+        // case ([0-9]+): return ([0-9]+) -> case \2: return \1
+        
+        if (type == BlockID.TORCH
+                || type == BlockID.REDSTONE_TORCH_OFF
+                || type == BlockID.REDSTONE_TORCH_ON) {
+            switch (data) {
+                case 3: return 1;
+                case 4: return 2;
+                case 2: return 3;
+                case 1: return 4;
+            }
+        } else if (type == BlockID.MINECART_TRACKS) {
+            switch (data) {
+                case 1: return 0;
+                case 0: return 1;
+                case 5: return 2;
+                case 4: return 3;
+                case 2: return 4;
+                case 3: return 5;
+                case 7: return 6;
+                case 8: return 7;
+                case 9: return 8;
+                case 6: return 9;
+            }
+        } else if (type == BlockID.WOODEN_STAIRS
+                || type == BlockID.COBBLESTONE_STAIRS) {
+            switch (data) {
+                case 2: return 0;
+                case 3: return 1;
+                case 1: return 2;
+                case 0: return 3;
+            }
+        } else if (type == BlockID.LEVER) {
+            int thrown = data & 0x8;
+            int withoutThrown = data ^ 0x8;
+            switch (withoutThrown) {
+                case 3: return 1 | thrown;
+                case 4: return 2 | thrown;
+                case 2: return 3 | thrown;
+                case 1: return 4 | thrown;
+            }
+        } else if (type == BlockID.WOODEN_DOOR
+                || type == BlockID.IRON_DOOR) {
+            int topHalf = data & 0x8;
+            int swung = data & 0x4;
+            int withoutFlags = data ^ (0x8 | 0x4);
+            switch (withoutFlags) {
+                case 1: return 0 | topHalf | swung;
+                case 2: return 1 | topHalf | swung;
+                case 3: return 2 | topHalf | swung;
+                case 0: return 3 | topHalf | swung;
+            }
+        } else if (type == BlockID.STONE_BUTTON) {
+            int thrown = data & 0x8;
+            int withoutThrown = data ^ 0x8;
+            switch (withoutThrown) {
+                case 3: return 1 | thrown;
+                case 4: return 2 | thrown;
+                case 2: return 3 | thrown;
+                case 1: return 4 | thrown;
+            }
+        } else if (type == BlockID.SIGN_POST) {
+            int newData = (data - 4);
+            if (newData < 0) {
+                newData += 16;
+            }
+            return newData;
+        } else if (type == BlockID.LADDER
+                || type == BlockID.WALL_SIGN
+                || type == BlockID.FURNACE
+                || type == BlockID.BURNING_FURNACE
+                || type == BlockID.DISPENSER) {
+            switch (data) {
+                case 5: return 2;
+                case 4: return 3;
+                case 2: return 4;
+                case 3: return 5;
+            }
+        } else if (type == BlockID.PUMPKIN
+                || type == BlockID.JACKOLANTERN) {
+            switch (data) {
+                case 1: return 0;
+                case 2: return 1;
+                case 3: return 2;
+                case 0: return 3;
+            }
+        }
+        
+        return data;
+    }
+
+    /**
+     * Flip a block's data value.
+     * 
+     * @param type
+     * @param data
+     * @return
+     */
+    public static int flip(int type, int data) {
+        return rotate90(type, rotate90(type, data));
+    }
+}