diff --git a/AppKit/CPWindow/CPWindow.j b/AppKit/CPWindow/CPWindow.j
index 1e2b05ab2..933e03c90 100644
--- a/AppKit/CPWindow/CPWindow.j
+++ b/AppKit/CPWindow/CPWindow.j
@@ -481,7 +481,7 @@ CPTexturedBackgroundWindowMask
         [self close];
 
     _platformWindow = aPlatformWindow;
-    [_platformWindow setTitle:_title];
+    [_platformWindow _setTitle:_title window:self];
 
     if (wasVisible)
         [self orderFront:self];
@@ -1367,7 +1367,7 @@ CPTexturedBackgroundWindowMask
     _title = aTitle;
 
     [_windowView setTitle:aTitle];
-    [_platformWindow setTitle:_title];
+    [_platformWindow _setTitle:_title window:self];
 
     [self _synchronizeMenuBarTitleWithWindowTitle];
 }
diff --git a/AppKit/Platform/CPPlatformWindow.j b/AppKit/Platform/CPPlatformWindow.j
index 2d47ce96e..4526cbd19 100644
--- a/AppKit/Platform/CPPlatformWindow.j
+++ b/AppKit/Platform/CPPlatformWindow.j
@@ -259,12 +259,12 @@ var PrimaryPlatformWindow   = NULL;
     return [CPPlatform isBrowser];
 }
 
-- (void)setTitle:(CPString)aTitle
+- (void)_setTitle:(CPString)aTitle window:(CPWindow)aWindow
 {
     _title = aTitle;
 
 #if PLATFORM(DOM)
-    if (_DOMWindow && _DOMWindow.document)
+    if (_DOMWindow && _DOMWindow.document && (aWindow === [CPApp mainWindow]))
         _DOMWindow.document.title = _title;
 #endif
 }
diff --git a/AppKit/Platform/DOM/CPPlatformWindow+DOM.j b/AppKit/Platform/DOM/CPPlatformWindow+DOM.j
index 66b847748..58ab7269e 100644
--- a/AppKit/Platform/DOM/CPPlatformWindow+DOM.j
+++ b/AppKit/Platform/DOM/CPPlatformWindow+DOM.j
@@ -541,7 +541,8 @@ var ModifierKeyCodes = [
     // FIXME: cpSetFrame?
     _DOMWindow.document.write("<!DOCTYPE html><html lang='en'><head></head><body style='background-color:transparent;'></body></html>");
     _DOMWindow.document.close();
-    _DOMWindow.document.title = _title;
+    if (self != [CPPlatformWindow primaryPlatformWindow])
+        _DOMWindow.document.title = _title;
 
     if (![CPPlatform isBrowser])
     {