diff --git a/src/as/com/threerings/miso/util/ObjectSet.as b/src/as/com/threerings/miso/util/ObjectSet.as
index 10f3459d..9fb940a3 100644
--- a/src/as/com/threerings/miso/util/ObjectSet.as
+++ b/src/as/com/threerings/miso/util/ObjectSet.as
@@ -144,7 +144,7 @@ public class ObjectSet
     };
 
     /**
-     * Returns the index of the object or it's insertion index if it is
+     * Returns the index of the object or its insertion index if it is
      * not in the set.
      */
     protected function indexOf (info :ObjectInfo) :int
diff --git a/src/java/com/threerings/media/ActiveRepaintManager.java b/src/java/com/threerings/media/ActiveRepaintManager.java
index f4b71035..d8943c8d 100644
--- a/src/java/com/threerings/media/ActiveRepaintManager.java
+++ b/src/java/com/threerings/media/ActiveRepaintManager.java
@@ -90,7 +90,7 @@ public class ActiveRepaintManager extends RepaintManager
 
             // if we find our validate root, we can stop looking; NOTE: JTextField incorrectly
             // claims to be a validate root thereby fucking up the program something serious; we
-            // jovially ignore it's claims here and restore order to the universe; see bug #403550
+            // jovially ignore its claims here and restore order to the universe; see bug #403550
             // for more fallout from Sun's fuckup
             if (!(c instanceof JTextField) && !(c instanceof JScrollPane) &&
                 ((JComponent)c).isValidateRoot()) {
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 619597fc..f73052c1 100644
--- a/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
+++ b/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
@@ -281,7 +281,7 @@ public class TileSetBundler
                 }
 
                 // make sure this tileset's image file exists and check
-                // it's last modified date
+                // its last modified date
                 File tsfile = new File(bundleDesc.getParent(),
                                        set.getImagePath());
                 if (!tsfile.exists()) {
diff --git a/src/java/com/threerings/miso/client/SceneObject.java b/src/java/com/threerings/miso/client/SceneObject.java
index d0deb4ee..a8442793 100644
--- a/src/java/com/threerings/miso/client/SceneObject.java
+++ b/src/java/com/threerings/miso/client/SceneObject.java
@@ -244,7 +244,7 @@ public class SceneObject
     }
 
     /**
-     * Updates this object's origin tile coordinate. It's bounds and other
+     * Updates this object's origin tile coordinate. Its bounds and other
      * cached screen coordinate information are updated.
      */
     public void relocateObject (MisoSceneMetrics metrics, int tx, int ty)
diff --git a/src/java/com/threerings/miso/util/ObjectSet.java b/src/java/com/threerings/miso/util/ObjectSet.java
index d0935c9f..9fbb61a1 100644
--- a/src/java/com/threerings/miso/util/ObjectSet.java
+++ b/src/java/com/threerings/miso/util/ObjectSet.java
@@ -146,7 +146,7 @@ public class ObjectSet
     }
 
     /**
-     * Returns the index of the object or it's insertion index if it is
+     * Returns the index of the object or its insertion index if it is
      * not in the set.
      */
     protected final int indexOf (ObjectInfo info)