diff --git a/etc/libs-incl.xml b/etc/libs-incl.xml
index f96deafd..4a11b290 100644
--- a/etc/libs-incl.xml
+++ b/etc/libs-incl.xml
@@ -6,7 +6,6 @@
     <include name="ant.jar"/>
     <include name="commons-collections.jar"/>
     <include name="commons-digester.jar"/>
-    <include name="commons-io.jar"/>
     <include name="commons-logging.jar"/>
     <include name="commons-beanutils.jar"/>
     <include name="google-collect.jar"/>
diff --git a/src/java/com/threerings/media/sound/JavaSoundPlayer.java b/src/java/com/threerings/media/sound/JavaSoundPlayer.java
index a4982f79..b2ce541c 100644
--- a/src/java/com/threerings/media/sound/JavaSoundPlayer.java
+++ b/src/java/com/threerings/media/sound/JavaSoundPlayer.java
@@ -40,21 +40,18 @@ import javax.sound.sampled.LineUnavailableException;
 import javax.sound.sampled.SourceDataLine;
 import javax.sound.sampled.UnsupportedAudioFileException;
 
-import org.apache.commons.io.IOUtils;
-
 import com.google.common.collect.Maps;
 
+import com.samskivert.io.StreamUtil;
+import com.samskivert.swing.RuntimeAdjust;
 import com.samskivert.util.LRUHashMap;
 import com.samskivert.util.Queue;
 import com.samskivert.util.RandomUtil;
 import com.samskivert.util.RunQueue;
 import com.samskivert.util.StringUtil;
 
-import com.samskivert.swing.RuntimeAdjust;
-
-import com.threerings.resource.ResourceManager;
-
 import com.threerings.media.MediaPrefs;
+import com.threerings.resource.ResourceManager;
 
 import static com.threerings.media.Log.log;
 
@@ -510,7 +507,7 @@ public class JavaSoundPlayer extends SoundPlayer
                 InputStream stream = getTestClip(key);
                 if (stream != null) {
                     data = new byte[1][];
-                    data[0] = IOUtils.toByteArray(stream);
+                    data[0] = StreamUtil.toByteArray(stream);
 
                 } else {
                     data = _loader.load(key.pkgPath, key.key);
diff --git a/src/java/com/threerings/media/sound/SoundLoader.java b/src/java/com/threerings/media/sound/SoundLoader.java
index 00daa9da..6e9b38a3 100644
--- a/src/java/com/threerings/media/sound/SoundLoader.java
+++ b/src/java/com/threerings/media/sound/SoundLoader.java
@@ -27,8 +27,7 @@ import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 
-import org.apache.commons.io.IOUtils;
-
+import com.samskivert.io.StreamUtil;
 import com.samskivert.util.Config;
 import com.samskivert.util.ConfigUtil;
 import com.samskivert.util.LRUHashMap;
@@ -170,7 +169,7 @@ public class SoundLoader
             }
         }
 
-        return IOUtils.toByteArray(clipin);
+        return StreamUtil.toByteArray(clipin);
     }
 
     protected ResourceManager _rmgr;
diff --git a/src/java/com/threerings/media/tile/bundle/tools/DirectoryTileSetBundler.java b/src/java/com/threerings/media/tile/bundle/tools/DirectoryTileSetBundler.java
index 8be78563..4b587513 100644
--- a/src/java/com/threerings/media/tile/bundle/tools/DirectoryTileSetBundler.java
+++ b/src/java/com/threerings/media/tile/bundle/tools/DirectoryTileSetBundler.java
@@ -31,7 +31,7 @@ import java.io.ObjectOutputStream;
 
 import javax.imageio.ImageIO;
 
-import org.apache.commons.io.IOUtils;
+import com.samskivert.io.StreamUtil;
 
 import com.threerings.media.tile.ImageProvider;
 import com.threerings.media.tile.ObjectTileSet;
@@ -137,7 +137,7 @@ public class DirectoryTileSetBundler extends TileSetBundler
                         outFile.getParentFile().mkdirs();
                         FileOutputStream fout = new FileOutputStream(outFile);
                         FileInputStream imgin = new FileInputStream(ifile);
-                        IOUtils.copy(imgin, fout);
+                        StreamUtil.copy(imgin, fout);
                     } catch (Exception e) {
                         String msg = "Failure bundling image " + ifile + ": " + e;
                         throw (IOException) new IOException(msg).initCause(e);
diff --git a/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java b/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
index f7593cb2..90836d8c 100644
--- a/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
+++ b/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
@@ -35,17 +35,14 @@ import java.io.IOException;
 import java.io.ObjectOutputStream;
 
 import java.awt.image.BufferedImage;
-
 import javax.imageio.ImageIO;
 
+import com.google.common.collect.Lists;
+import org.apache.commons.digester.Digester;
 import org.xml.sax.SAXException;
 
-import org.apache.commons.digester.Digester;
-import org.apache.commons.io.IOUtils;
-
-import com.google.common.collect.Lists;
-
 import com.samskivert.io.PersistenceException;
+import com.samskivert.io.StreamUtil;
 import com.samskivert.util.HashIntMap;
 
 import com.threerings.resource.FastImageIO;
@@ -429,7 +426,7 @@ public class TileSetBundler
                         } else {
                             jar.putNextEntry(new JarEntry(imagePath));
                             FileInputStream imgin = new FileInputStream(ifile);
-                            IOUtils.copy(imgin, jar);
+                            StreamUtil.copy(imgin, jar);
                         }
                     } catch (Exception e) {
                         String msg = "Failure bundling image " + ifile +
diff --git a/src/java/com/threerings/resource/FastImageIO.java b/src/java/com/threerings/resource/FastImageIO.java
index 18c7adff..7ac2cede 100644
--- a/src/java/com/threerings/resource/FastImageIO.java
+++ b/src/java/com/threerings/resource/FastImageIO.java
@@ -41,7 +41,7 @@ import java.awt.image.IndexColorModel;
 import java.awt.image.PixelInterleavedSampleModel;
 import java.awt.image.WritableRaster;
 
-import org.apache.commons.io.IOUtils;
+import com.samskivert.io.StreamUtil;
 
 /**
  * Provides routines for writing and reading uncompressed 8-bit color
@@ -134,7 +134,7 @@ public class FastImageIO
     public static BufferedImage read (InputStream in)
         throws IOException
     {
-        return read(ByteBuffer.wrap(IOUtils.toByteArray(in)));
+        return read(ByteBuffer.wrap(StreamUtil.toByteArray(in)));
     }
 
     /**
diff --git a/src/java/com/threerings/resource/FileResourceBundle.java b/src/java/com/threerings/resource/FileResourceBundle.java
index 774597c2..6aa99506 100644
--- a/src/java/com/threerings/resource/FileResourceBundle.java
+++ b/src/java/com/threerings/resource/FileResourceBundle.java
@@ -33,8 +33,7 @@ import java.io.InputStream;
 
 import java.awt.image.BufferedImage;
 
-import org.apache.commons.io.IOUtils;
-
+import com.samskivert.io.StreamUtil;
 import com.samskivert.util.FileUtil;
 import com.samskivert.util.StringUtil;
 
@@ -248,7 +247,7 @@ public class FileResourceBundle extends ResourceBundle
         // copy the resource into the temporary file
         BufferedOutputStream fout = new BufferedOutputStream(new FileOutputStream(tfile));
         InputStream jin = _jarSource.getInputStream(entry);
-        IOUtils.copy(jin, fout);
+        StreamUtil.copy(jin, fout);
         jin.close();
         fout.close();