=== modified file 'src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java'
--- src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java	2016-04-21 17:01:43 +0000
+++ src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java	2016-04-22 19:47:01 +0000
@@ -49,6 +49,7 @@
 **                  into the converted code (i.e. invoke external programs, procedures or 
 **                  functions).  Can be used only when the P2J client runs embedded in a 
 **                  customer-specific application.
+**     SBI 20160422 The resize drawing operations must not be cached.
 */
 
 package com.goldencode.p2j.ui.client.gui.driver.web;
@@ -87,6 +88,9 @@
    /** The maximum cache size. */
    private static final int MAX_DRAW_CACHE_SIZE = 1000;
 
+   /** The magic hash sum indicates that the batch of drawing operations mustn't be cached. */
+   private static byte[] MAGIC = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
    /** The provider for MD5 hashes. */
    private MessageDigest MD5 = null; 
    
@@ -109,6 +113,9 @@
    /** Accumulator to track the total number of pending bytes on the drawing ops list. */
    private int pendingBytes = 0;
    
+   /** Pending resize operations counter */
+   private int resizeOps = 0;
+
    /**
     * Accumulator to track the total number of pending bytes on the drawing ops list, including  
     * the operations which were replaced with a hash code (as the resulted image is already 
@@ -606,6 +613,8 @@
    public void resizeWindow(int width, int height)
    {
       allocateAndSend(PaintPrimitives.RESIZE_WINDOW, width, height);
+      
+      resizeOps++;
    }
    
    /**
@@ -619,6 +628,8 @@
    public void setWindowLocation(int x, int y)
    {
       allocateAndSend(PaintPrimitives.SET_LOCATION, x, y);
+      
+      resizeOps++;
    }
    
    /**
@@ -636,6 +647,8 @@
    public void setWindowBounds(int x, int y, int width, int height)
    {
       allocateAndSend(PaintPrimitives.SET_WINDOW_BOUNDS, x, y, width, height);
+      
+      resizeOps++;
    }
    
    /**
@@ -1035,7 +1048,11 @@
                                                     pendingNoCacheBytes));
       if (drawHash != null)
       {
-         if (Arrays.equals(drawHash, lastHash))
+         if (resizeOps > 0)
+         {
+            System.arraycopy(MAGIC, 0, total, 1, HASH_LENGTH);
+         }
+         else if (Arrays.equals(drawHash, lastHash))
          {
             // do not send if duplicated message
             doSend = false;
@@ -1071,7 +1088,7 @@
          }
          lastHash = drawHash;
       }
-      
+
       if (doSend)
       {
          // send it to the javascript side
@@ -1083,6 +1100,7 @@
       pendingBytes = 0;
       drawingNoCacheOps.clear();
       pendingNoCacheBytes = 0;
+      resizeOps = 0;
    }
    
    /**

=== modified file 'src/com/goldencode/p2j/ui/client/gui/driver/web/res/p2j.screen.js'
--- src/com/goldencode/p2j/ui/client/gui/driver/web/res/p2j.screen.js	2016-04-20 19:06:19 +0000
+++ src/com/goldencode/p2j/ui/client/gui/driver/web/res/p2j.screen.js	2016-04-22 16:44:54 +0000
@@ -46,6 +46,7 @@
 **                  fixed TypedArray.slice is unsupported by IE. 
 ** 011 HC  20160406 Overhaul of window-activation logic.
 ** 012 SBI 20160414 Fixed  doWindowActivationChange(...) and activateTopVisibleWindow(...).
+**     SBI 20160422 The resize drawing operations must not be cached.
 */
 
 "use strict";
@@ -422,6 +423,9 @@
 
       this.drawCache = {};
 
+      /** Indicates that drawing operations can be cached */
+      this.canBeCached = true;
+
       /** The off screen canvas to be used to make batch drawing. */
       this.offscreenCanvas = document.createElement('canvas');
       this.offscreenContext = this.offscreenCanvas.getContext('2d', {alpha : true});
@@ -1734,7 +1738,7 @@
       {
          this.ctx.drawImage(this.offscreenCanvas, 0, 0);
          // if this is the end of a drawing bracket (clip and translate are zero), save the canvas
-         if (this.clips == 0 && this.trans == 0)
+         if (this.clips == 0 && this.trans == 0 && this.canBeCached)
          {
             // save the offscreen canvas
             var img = new Image();
@@ -1744,6 +1748,7 @@
             // clear the offscreen canvas for next drawing
             this.canvasRenderer.clear();
          }
+         
       }
       
       p2j.logger.log("END DRAWING CYCLE FOR WINDOW " + this.id);
@@ -3164,7 +3169,24 @@
       var oldMouse = win.processMouse;
       win.processMouse = false;
 
-      if (win.hasCachedDraw(md5))
+      // if hash sum are filled with zeros, then don't cache drawing operations
+      var magic = true;
+      for (var i = 0; i < 16; i++)
+      {
+         if (md5a[i] != 0)
+         {
+            magic = false;
+            break;
+         }
+      }
+
+      if (magic)
+      {
+         win.canBeCached = false;
+         win.draw(message, md5);
+         win.canBeCached = true;
+      }
+      else if (win.hasCachedDraw(md5))
       {
          var cachedDraw = win.getCachedDraw(md5);
          
@@ -3181,7 +3203,7 @@
       
       win.processMouse = oldMouse;
    };
-
+   
    /**
     * The method performs a layout operation on the supplied text and returns the resulting 
     * paragraph height while maintaining the supplied maximum width.