diff --git a/src/java/com/threerings/media/animation/MultiFrameAnimation.java b/src/java/com/threerings/media/animation/MultiFrameAnimation.java
index 4abb8100..85de408f 100644
--- a/src/java/com/threerings/media/animation/MultiFrameAnimation.java
+++ b/src/java/com/threerings/media/animation/MultiFrameAnimation.java
@@ -99,22 +99,13 @@ public class MultiFrameAnimation extends Animation
 
         } else if (fidx != _fidx) {
             // make a note of our current bounds
-            Rectangle dirty = new Rectangle(_bounds);
+            Rectangle obounds = new Rectangle(_bounds);
 
             // update our frame index and bounds
             setFrameIndex(fidx);
 
-            if (_mgr != null) {
-                // if our new bounds intersect our old bounds, grow a single
-                // dirty rectangle to incorporate them both, otherwise
-                // invalidate them separately
-                if (_bounds.intersects(dirty)) {
-                    dirty.add(_bounds);
-                } else {
-                    _mgr.getRegionManager().invalidateRegion(_bounds);
-                }
-                _mgr.getRegionManager().addDirtyRegion(dirty);
-            }
+            // invalidate our old and new bounds
+            invalidateAfterChange(obounds);
         }
     }