diff --git a/bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java b/bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java
index 15188dd244..7f413707d5 100644
--- a/bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java
+++ b/bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/internal/workbench/swt/PartRenderingEngine.java
@@ -1130,6 +1130,12 @@ public void eventLoopException(Throwable exception) {
 							advisor.eventLoopIdle(display);
 						}
 					} catch (ThreadDeath th) {
+
+						for (Shell shell : display.getShells()) {
+							shell.close();
+						}
+						display.close();
+
 						throw th;
 					} catch (Exception ex) {
 						handle(ex, advisor);
diff --git a/bundles/org.eclipse.rap.rwt/js/rwt/widgets/Browser.js b/bundles/org.eclipse.rap.rwt/js/rwt/widgets/Browser.js
index ff60807174..b25d6ca36e 100644
--- a/bundles/org.eclipse.rap.rwt/js/rwt/widgets/Browser.js
+++ b/bundles/org.eclipse.rap.rwt/js/rwt/widgets/Browser.js
@@ -146,6 +146,7 @@ rwt.qx.Class.define( "rwt.widgets.Browser", {
       try {
         result = this._parseEvalResult( this._eval( script ) );
       } catch( ex ) {
+		console.log(ex);
         success = false;
       }
       var connection = rwt.remote.Connection.getInstance();
@@ -198,7 +199,7 @@ rwt.qx.Class.define( "rwt.widgets.Browser", {
           // not accessible when it appears it should be
           // => user navigated to external site.
           this._throwSecurityException( true );
-        }
+      	}
       }
     },
 
@@ -215,21 +216,26 @@ rwt.qx.Class.define( "rwt.widgets.Browser", {
     },
 
     _eval : function( script ) {
-      var win = this.getContentWindow();
-      if( !win[ "eval" ] && win[ "execScript" ] ) {
-        // Workaround for IE bug, see: http://www.thismuchiknow.co.uk/?p=25
-        win.execScript( "null;", "JScript" );
-      }
-      return win[ "eval" ]( script );
+      var win = this.getContentWindow();    
+      
+      if (win !== null) {
+	      if( !win[ "eval" ] && win[ "execScript" ] ) {
+	        // Workaround for IE bug, see: http://www.thismuchiknow.co.uk/?p=25
+	        win.execScript( "null;", "JScript" );
+	      }
+	      return win[ "eval" ]( script );
+      } else {
+		  console.error("Window is null, can not execute scipts:\n" + script);
+	  }
     },
 
     _parseEvalResult : function( value ) {
       var result = null;
       var win = this.getContentWindow();
       // NOTE: This mimics the behavior of the evaluate method in SWT:
-      if( value instanceof win.Function || value instanceof Function ) {
+      if( (win !== null && value instanceof win.Function) || value instanceof Function ) {
         result = this.toJSON( [ [] ] );
-      } else if( value instanceof win.Array || value instanceof Array ) {
+      } else if( (win !== null && value instanceof win.Array) || value instanceof Array ) {
         result = this.toJSON( [ value ] );
       } else if( typeof value !== "object" && typeof value !== "function" ) {
         // above: some browser say regular expressions of the type "function"
diff --git a/bundles/org.eclipse.rap.rwt/src/org/eclipse/swt/browser/Browser.java b/bundles/org.eclipse.rap.rwt/src/org/eclipse/swt/browser/Browser.java
index d0e4148d4e..0719789bca 100644
--- a/bundles/org.eclipse.rap.rwt/src/org/eclipse/swt/browser/Browser.java
+++ b/bundles/org.eclipse.rap.rwt/src/org/eclipse/swt/browser/Browser.java
@@ -36,6 +36,7 @@
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.TypedListener;
 
 
@@ -80,6 +81,7 @@ public class Browser extends Composite {
   private BrowserCallback browserCallback;
   private transient IBrowserAdapter browserAdapter;
   private final List<BrowserFunction> functions;
+  private boolean clientInited = false;
 
   /**
    * Constructs a new instance of this class given its parent
@@ -258,6 +260,33 @@ public boolean execute( String script ) {
     if( executeScript != null ) {
       throw new IllegalStateException( "Another script is already pending" );
     }
+    
+    boolean showedShell = false;
+    Shell shell = getShell();
+
+    try {
+      // Show the shell, so that the browser is created in the browser           
+      if (!clientInited && shell != null && !shell.getVisible()) {
+        showedShell = true;
+        //shell.setMinimized(true);
+        shell.setVisible(true);    
+        internalExecute( "" );
+      }      
+            
+      internalExecute( script );
+    } finally {
+      // if we showed it, we have to hide it again
+      if (showedShell) {
+        //shell.setMinimized(false);
+        shell.setVisible(false);
+        internalExecute( "" );
+      }
+      clientInited = true;
+    }
+    return executeResult.booleanValue();
+  }
+
+  protected void internalExecute( String script ) {
     executeScript = script;
     executeResult = null;
     while( executeResult == null ) {
@@ -268,7 +297,6 @@ public boolean execute( String script ) {
     }
     executeScript = null;
     executePending = false;
-    return executeResult.booleanValue();
   }
 
   /**
diff --git a/tests/org.eclipse.rap.rwt.test/src/org/eclipse/swt/browser/Browser_Test.java b/tests/org.eclipse.rap.rwt.test/src/org/eclipse/swt/browser/Browser_Test.java
index 5e80f3670f..b3f8099d7b 100644
--- a/tests/org.eclipse.rap.rwt.test/src/org/eclipse/swt/browser/Browser_Test.java
+++ b/tests/org.eclipse.rap.rwt.test/src/org/eclipse/swt/browser/Browser_Test.java
@@ -34,6 +34,7 @@
 import org.eclipse.rap.rwt.testfixture.TestContext;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTError;
+import org.eclipse.swt.SWTException;
 import org.eclipse.swt.internal.browser.browserkit.BrowserLCA;
 import org.eclipse.swt.internal.events.EventTypes;
 import org.eclipse.swt.internal.widgets.IBrowserAdapter;
@@ -356,9 +357,12 @@ public void run() {
       }
     } );
 
-    boolean result = browser.execute( "var x = 2;" );
-
-    assertFalse( result );
+    try {
+      boolean result = browser.execute( "var x = 2;" );
+      fail();
+    } catch( SWTException expected ) {
+      assertEquals( "Widget is disposed", expected.getMessage() );
+    }
   }
 
   @Test