diff --git a/editor/ui/composer/content/TextEditorAppShell.xul b/editor/ui/composer/content/TextEditorAppShell.xul
index 2494e9b231c4..9eea54f04176 100644
--- a/editor/ui/composer/content/TextEditorAppShell.xul
+++ b/editor/ui/composer/content/TextEditorAppShell.xul
@@ -41,7 +41,7 @@
         onunload="EditorShutdown()"
         onclose="return EditorCanClose()"
         onfocus="EditorOnFocus()"
-        contenttitlesettting="true"
+        contenttitlesetting="true"
         title=""
         titlemodifier="&textEditorWindow.titlemodifier;"
         titlemenuseparator="&editorWindow.titlemodifiermenuseparator;"
diff --git a/editor/ui/composer/content/editor.xul b/editor/ui/composer/content/editor.xul
index b1b6e772993d..c42cfbad3beb 100644
--- a/editor/ui/composer/content/editor.xul
+++ b/editor/ui/composer/content/editor.xul
@@ -43,7 +43,7 @@
         onunload="EditorShutdown()"
         onclose="return EditorCanClose()"
         onfocus="EditorOnFocus()"
-        contenttitlesettting="true"
+        contenttitlesetting="true"
         titlemodifier="&editorWindow.titlemodifier;"
         titlemenuseparator="&editorWindow.titlemodifiermenuseparator;"
         windowtype="composer:html"
diff --git a/xpfe/appshell/src/nsContentTreeOwner.cpp b/xpfe/appshell/src/nsContentTreeOwner.cpp
index cf8b3f7a6969..3e711671ce4c 100644
--- a/xpfe/appshell/src/nsContentTreeOwner.cpp
+++ b/xpfe/appshell/src/nsContentTreeOwner.cpp
@@ -637,7 +637,7 @@ void nsContentTreeOwner::XULWindow(nsXULWindow* aXULWindow)
 
       if(docShellElement)  
          {
-         docShellElement->GetAttribute(NS_ConvertASCIItoUCS2("contenttitlesettting"), contentTitleSetting);
+         docShellElement->GetAttribute(NS_ConvertASCIItoUCS2("contenttitlesetting"), contentTitleSetting);
          if(contentTitleSetting.EqualsWithConversion("true"))
             {
             mContentTitleSetting = PR_TRUE;
diff --git a/xpfe/browser/resources/content/navigator.xul b/xpfe/browser/resources/content/navigator.xul
index 9d4c5224d913..756900a38684 100644
--- a/xpfe/browser/resources/content/navigator.xul
+++ b/xpfe/browser/resources/content/navigator.xul
@@ -46,7 +46,7 @@ Contributor(s): ______________________________________. -->
         xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
         onload="Startup()" onunload="Shutdown()"
-        contenttitlesettting="true"
+        contenttitlesetting="true"
         title="&mainWindow.title;" 
         titlemodifier="&mainWindow.titlemodifier;" 
         titlemenuseparator="&mainWindow.titlemodifiermenuseparator;"