diff --git a/platform/platform-impl/src/com/intellij/ui/BalloonImpl.java b/platform/platform-impl/src/com/intellij/ui/BalloonImpl.java
index 15bb60eb6a82..5d42a065f141 100644
--- a/platform/platform-impl/src/com/intellij/ui/BalloonImpl.java
+++ b/platform/platform-impl/src/com/intellij/ui/BalloonImpl.java
@@ -1330,6 +1330,11 @@ public class BalloonImpl implements Balloon, IdeTooltip.Ui {
     }
 
     public void _setBounds(Rectangle bounds) {
+      Rectangle currentBounds = getBounds();
+      if (currentBounds.width != bounds.width || currentBounds.height != bounds.height) {
+        invalidateShadowImage();
+      }
+
       super.setBounds(bounds);
       if (myCloseRec.getParent() == null && getParent() != null) {
         myLayeredPane.add(myCloseRec);
@@ -1357,6 +1362,11 @@ public class BalloonImpl implements Balloon, IdeTooltip.Ui {
       }
     }
 
+    private void invalidateShadowImage() {
+      myImage = null;
+      myShadow = null;
+    }
+
     public void repaintButton() {
       myCloseRec.repaint();
     }