Oh yeah, baby.

content/xul/content/public/nsIXULPopupListener.h

@@ -28,7 +28,8 @@ class nsIDOMElement;
 typedef enum {
     eXULPopupType_popup,
     eXULPopupType_context,
-    eXULPopupType_tooltip
+    eXULPopupType_tooltip,
+    eXULPopupType_blur
 } XULPopupType;
 
 class nsIXULPopupListener: public nsISupports {

content/xul/content/src/nsXULPopupListener.cpp

@@ -137,9 +137,9 @@ XULPopupListenerImpl::QueryInterface(REFNSIID iid, void** result)
 NS_IMETHODIMP
 XULPopupListenerImpl::Init(nsIDOMElement* aElement, const XULPopupType& popup)
 {
-    element = aElement; // Weak reference. Don't addref it.
-    popupType = popup;
-    return NS_OK;
+  element = aElement; // Weak reference. Don't addref it.
+  popupType = popup;
+  return NS_OK;
 }
 
 ////////////////////////////////////////////////////////////////
@@ -252,7 +252,7 @@ XULPopupListenerImpl::LaunchPopup(nsIDOMEvent* anEvent)
           domWindow->CreateAnchoredPopup(element, popupContent,
                                          anchorAlignment, type, popupAlignment);
         }
-		xulDocument->SetPopup(nsnull);
+		    xulDocument->SetPopup(nsnull);
       }
       NS_RELEASE(global);
     }

content/xul/document/src/nsXULDocument.cpp

@@ -2995,22 +2995,11 @@ XULDocumentImpl::CreatePopupDocument(nsIContent* aPopupElement, nsIDocument** aR
     NS_IF_ADDREF(mPopup);
     popupDoc->mPopup = mPopup;
 
-    // Our root content is the first child of the popup 
-    // node.
-    nsCOMPtr<nsIContent> firstChild;
-    PRInt32 childCount;
-    aPopupElement->ChildCount(childCount);
-    if (childCount == 0)
-      return NS_OK;
-    
-    aPopupElement->ChildAt(0, *getter_AddRefs(firstChild));
-
-    // Our root is firstChild. Suck all of this
-    // content into our document.
+    // Suck all of the root's content into our document.
     // We need to make the XUL builder instantiate this node.
     // Retrieve the resource that corresponds to this node.
     nsAutoString idValue;
-    nsCOMPtr<nsIDOMElement> domRoot = do_QueryInterface(firstChild);
+    nsCOMPtr<nsIDOMElement> domRoot = do_QueryInterface(aPopupElement);
     domRoot->GetAttribute("id", idValue);
     const char* url;
     mDocumentURL->GetSpec(&url);

rdf/content/public/nsIXULPopupListener.h

@@ -28,7 +28,8 @@ class nsIDOMElement;
 typedef enum {
     eXULPopupType_popup,
     eXULPopupType_context,
-    eXULPopupType_tooltip
+    eXULPopupType_tooltip,
+    eXULPopupType_blur
 } XULPopupType;
 
 class nsIXULPopupListener: public nsISupports {

rdf/content/src/nsXULDocument.cpp

@@ -2995,22 +2995,11 @@ XULDocumentImpl::CreatePopupDocument(nsIContent* aPopupElement, nsIDocument** aR
     NS_IF_ADDREF(mPopup);
     popupDoc->mPopup = mPopup;
 
-    // Our root content is the first child of the popup 
-    // node.
-    nsCOMPtr<nsIContent> firstChild;
-    PRInt32 childCount;
-    aPopupElement->ChildCount(childCount);
-    if (childCount == 0)
-      return NS_OK;
-    
-    aPopupElement->ChildAt(0, *getter_AddRefs(firstChild));
-
-    // Our root is firstChild. Suck all of this
-    // content into our document.
+    // Suck all of the root's content into our document.
     // We need to make the XUL builder instantiate this node.
     // Retrieve the resource that corresponds to this node.
     nsAutoString idValue;
-    nsCOMPtr<nsIDOMElement> domRoot = do_QueryInterface(firstChild);
+    nsCOMPtr<nsIDOMElement> domRoot = do_QueryInterface(aPopupElement);
     domRoot->GetAttribute("id", idValue);
     const char* url;
     mDocumentURL->GetSpec(&url);

rdf/content/src/nsXULPopupListener.cpp

@@ -137,9 +137,9 @@ XULPopupListenerImpl::QueryInterface(REFNSIID iid, void** result)
 NS_IMETHODIMP
 XULPopupListenerImpl::Init(nsIDOMElement* aElement, const XULPopupType& popup)
 {
-    element = aElement; // Weak reference. Don't addref it.
-    popupType = popup;
-    return NS_OK;
+  element = aElement; // Weak reference. Don't addref it.
+  popupType = popup;
+  return NS_OK;
 }
 
 ////////////////////////////////////////////////////////////////
@@ -252,7 +252,7 @@ XULPopupListenerImpl::LaunchPopup(nsIDOMEvent* anEvent)
           domWindow->CreateAnchoredPopup(element, popupContent,
                                          anchorAlignment, type, popupAlignment);
         }
-		xulDocument->SetPopup(nsnull);
+		    xulDocument->SetPopup(nsnull);
       }
       NS_RELEASE(global);
     }