diff --git a/src/main/java/com/sk89q/worldedit/EditSession.java b/src/main/java/com/sk89q/worldedit/EditSession.java
index 1f7be6319..8993e72a1 100644
--- a/src/main/java/com/sk89q/worldedit/EditSession.java
+++ b/src/main/java/com/sk89q/worldedit/EditSession.java
@@ -999,7 +999,7 @@ public class EditSession {
      * @return number of blocks affected
      * @throws MaxChangedBlocksException
      */
-    public int replaceBlocks(Region region, Set<Integer> fromBlockTypes,
+    public int replaceBlocks(Region region, Set<BaseBlock> fromBlockTypes,
             BaseBlock toBlock) throws MaxChangedBlocksException {
         int affected = 0;
 
@@ -1019,11 +1019,10 @@ public class EditSession {
                 for (int y = minY; y <= maxY; ++y) {
                     for (int z = minZ; z <= maxZ; ++z) {
                         Vector pt = new Vector(x, y, z);
-                        int curBlockType = getBlockType(pt);
+                        BaseBlock curBlockType = getBlock(pt);
 
-                        if ((fromBlockTypes == null && curBlockType != 0)
-                                || (fromBlockTypes != null && fromBlockTypes
-                                        .contains(curBlockType))) {
+                        if ((fromBlockTypes == null && !curBlockType.isAir())
+                                || (fromBlockTypes != null && curBlockType.inIterable(fromBlockTypes))) {
                             if (setBlock(pt, toBlock)) {
                                 ++affected;
                             }
@@ -1033,10 +1032,10 @@ public class EditSession {
             }
         } else {
             for (Vector pt : region) {
-                int curBlockType = getBlockType(pt);
+                BaseBlock curBlockType = getBlock(pt);
 
-                if (fromBlockTypes == null && curBlockType != 0
-                        || fromBlockTypes.contains(curBlockType)) {
+                if (fromBlockTypes == null && !curBlockType.isAir()
+                        || fromBlockTypes != null && curBlockType.inIterable(fromBlockTypes)) {
                     if (setBlock(pt, toBlock)) {
                         ++affected;
                     }
@@ -1056,7 +1055,7 @@ public class EditSession {
      * @return number of blocks affected
      * @throws MaxChangedBlocksException
      */
-    public int replaceBlocks(Region region, Set<Integer> fromBlockTypes,
+    public int replaceBlocks(Region region, Set<BaseBlock> fromBlockTypes,
             Pattern pattern) throws MaxChangedBlocksException {
         int affected = 0;
 
@@ -1076,11 +1075,10 @@ public class EditSession {
                 for (int y = minY; y <= maxY; ++y) {
                     for (int z = minZ; z <= maxZ; ++z) {
                         Vector pt = new Vector(x, y, z);
-                        int curBlockType = getBlockType(pt);
+                        BaseBlock curBlockType = getBlock(pt);
 
-                        if ((fromBlockTypes == null && curBlockType != 0)
-                                || (fromBlockTypes != null && fromBlockTypes
-                                        .contains(curBlockType))) {
+                        if ((fromBlockTypes == null && !curBlockType.isAir())
+                                || (fromBlockTypes != null && curBlockType.inIterable(fromBlockTypes))) {
                             if (setBlock(pt, pattern.next(pt))) {
                                 ++affected;
                             }
@@ -1090,10 +1088,10 @@ public class EditSession {
             }
         } else {
             for (Vector pt : region) {
-                int curBlockType = getBlockType(pt);
+                BaseBlock curBlockType = getBlock(pt);
 
-                if (fromBlockTypes == null && curBlockType != 0
-                        || fromBlockTypes.contains(curBlockType)) {
+                if (fromBlockTypes == null && !curBlockType.isAir()
+                        || curBlockType.inIterable(fromBlockTypes)) {
                     if (setBlock(pt, pattern.next(pt))) {
                         ++affected;
                     }
diff --git a/src/main/java/com/sk89q/worldedit/WorldEdit.java b/src/main/java/com/sk89q/worldedit/WorldEdit.java
index 445cb981d..4d7d515fe 100644
--- a/src/main/java/com/sk89q/worldedit/WorldEdit.java
+++ b/src/main/java/com/sk89q/worldedit/WorldEdit.java
@@ -400,6 +400,21 @@ public class WorldEdit {
         return getBlock(player, id, false);
     }
 
+    public Set<BaseBlock> getBlocks (LocalPlayer player, String list, boolean allAllowed)
+            throws DisallowedItemException, UnknownItemException {
+        String[] items = list.split(",");
+        Set<BaseBlock> blocks = new HashSet<BaseBlock>();
+        for (String id : items) {
+            blocks.add(getBlock(player, id, allAllowed));
+        }
+        return blocks;
+    }
+
+    public Set<BaseBlock> getBlocks(LocalPlayer player, String list)
+            throws DisallowedItemException, UnknownItemException {
+        return getBlocks(player, list, false);
+    }
+
     /**
      * Get a list of blocks as a set. This returns a Pattern.
      *
diff --git a/src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java b/src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java
index 920508409..dcc58d25f 100644
--- a/src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java
+++ b/src/main/java/com/sk89q/worldedit/blocks/BaseBlock.java
@@ -115,4 +115,26 @@ public class BaseBlock {
     public void flip(FlipDirection direction) {
         data = (char)BlockData.flip(type, data, direction);
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (!(o instanceof BaseBlock)) {
+            return false;
+        }
+        return (type == ((BaseBlock)o).type) && (data == ((BaseBlock)o).data);
+    }
+    
+    @Override
+    public String toString() {
+        return "BaseBlock id: " + getType() + " with damage: " + getData();
+    }
+
+    public boolean inIterable(Iterable<BaseBlock> iter) {
+        for (BaseBlock block : iter) {
+            if (block.equals(this)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }
diff --git a/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java b/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
index 53f4954cd..d3488219f 100644
--- a/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
+++ b/src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
@@ -81,13 +81,13 @@ public class RegionCommands {
             LocalSession session, LocalPlayer player, EditSession editSession)
             throws WorldEditException {
         
-        Set<Integer> from;
+        Set<BaseBlock> from;
         Pattern to;
         if (args.argsLength() == 1) {
             from = null;
             to = we.getBlockPattern(player, args.getString(0));
         } else {
-            from = we.getBlockIDs(player, args.getString(0), true);
+            from = we.getBlocks(player, args.getString(0), true);
             to = we.getBlockPattern(player, args.getString(1));
         }
 
diff --git a/src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java b/src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java
index 0ff9b8f9d..96642daab 100644
--- a/src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java
+++ b/src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java
@@ -239,13 +239,13 @@ public class UtilityCommands {
         
         int size = Math.max(1, args.getInteger(0));
         int affected;
-        Set<Integer> from;
+        Set<BaseBlock> from;
         Pattern to;
         if (args.argsLength() == 2) {
             from = null;
             to = we.getBlockPattern(player, args.getString(1));
         } else {
-            from = we.getBlockIDs(player, args.getString(1), true);
+            from = we.getBlocks(player, args.getString(1), true);
             to = we.getBlockPattern(player, args.getString(2));
         }