Index: Core/Common/src/Core.Common.Controls/Views/HtmlPageView.cs
===================================================================
diff -u -r959988504e0c650ed5d43eca648efae3f97f7b9c -ra3388f7316f4e953275d33d799cf62dd5fd7594d
--- Core/Common/src/Core.Common.Controls/Views/HtmlPageView.cs	(.../HtmlPageView.cs)	(revision 959988504e0c650ed5d43eca648efae3f97f7b9c)
+++ Core/Common/src/Core.Common.Controls/Views/HtmlPageView.cs	(.../HtmlPageView.cs)	(revision a3388f7316f4e953275d33d799cf62dd5fd7594d)
@@ -34,7 +34,10 @@
                 }
                 else
                 {
-                    webBrowser.Navigate("");
+                    if (!IsDisposed)
+                    {
+                        webBrowser.Navigate("");
+                    }
                 }
             }
         }