diff --git a/mozilla/layout/generic/nsFrameSetFrame.cpp b/mozilla/layout/generic/nsFrameSetFrame.cpp
index a5b7539314a..78319ed8609 100644
--- a/mozilla/layout/generic/nsFrameSetFrame.cpp
+++ b/mozilla/layout/generic/nsFrameSetFrame.cpp
@@ -1341,6 +1341,9 @@ nsHTMLFramesetFrame::StartMouseDrag(nsIPresContext& aPresContext, nsHTMLFrameset
       NS_RELEASE(viewMan);
       mDragger = aBorder;
 
+      //XXX This should go away!  Border should have own view instead
+      view->SetViewFlags(NS_VIEW_FLAG_DONT_CHECK_CHILDREN);
+
       // can't set it to this event's point - it is not in framesetframe coords
       mLastDragPoint.MoveTo(NULL_POINT_X, NULL_POINT_Y);
 
@@ -1444,6 +1447,8 @@ nsHTMLFramesetFrame::EndMouseDrag()
       PRBool ignore;
       viewMan->GrabMouseEvents(nsnull, ignore);
       NS_RELEASE(viewMan);
+      //XXX This should go away!  Border should have own view instead
+      view->ClearViewFlags(NS_VIEW_FLAG_DONT_CHECK_CHILDREN);
     }
   }
   gDragInProgress = PR_FALSE;
diff --git a/mozilla/layout/html/document/src/nsFrameSetFrame.cpp b/mozilla/layout/html/document/src/nsFrameSetFrame.cpp
index a5b7539314a..78319ed8609 100644
--- a/mozilla/layout/html/document/src/nsFrameSetFrame.cpp
+++ b/mozilla/layout/html/document/src/nsFrameSetFrame.cpp
@@ -1341,6 +1341,9 @@ nsHTMLFramesetFrame::StartMouseDrag(nsIPresContext& aPresContext, nsHTMLFrameset
       NS_RELEASE(viewMan);
       mDragger = aBorder;
 
+      //XXX This should go away!  Border should have own view instead
+      view->SetViewFlags(NS_VIEW_FLAG_DONT_CHECK_CHILDREN);
+
       // can't set it to this event's point - it is not in framesetframe coords
       mLastDragPoint.MoveTo(NULL_POINT_X, NULL_POINT_Y);
 
@@ -1444,6 +1447,8 @@ nsHTMLFramesetFrame::EndMouseDrag()
       PRBool ignore;
       viewMan->GrabMouseEvents(nsnull, ignore);
       NS_RELEASE(viewMan);
+      //XXX This should go away!  Border should have own view instead
+      view->ClearViewFlags(NS_VIEW_FLAG_DONT_CHECK_CHILDREN);
     }
   }
   gDragInProgress = PR_FALSE;
diff --git a/mozilla/view/public/nsIView.h b/mozilla/view/public/nsIView.h
index cee159c63bd..6fbe7d6b60c 100644
--- a/mozilla/view/public/nsIView.h
+++ b/mozilla/view/public/nsIView.h
@@ -428,6 +428,13 @@ public:
    */
   NS_IMETHOD SetViewFlags(PRInt32 aFlags) = 0;
 
+  /**
+   * Remove flags from view to allow customization of view behavior during
+   * event handling
+   * @param aFlags flags to be removed from view
+   */
+  NS_IMETHOD ClearViewFlags(PRInt32 aFlags) = 0;
+
 private:
   NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
   NS_IMETHOD_(nsrefcnt) Release(void) = 0;
diff --git a/mozilla/view/src/nsView.cpp b/mozilla/view/src/nsView.cpp
index 4d5fe1a0b67..33593dc31fd 100644
--- a/mozilla/view/src/nsView.cpp
+++ b/mozilla/view/src/nsView.cpp
@@ -1296,6 +1296,12 @@ NS_IMETHODIMP nsView :: SetViewFlags(PRInt32 aFlags)
   return NS_OK;
 }
 
+NS_IMETHODIMP nsView :: ClearViewFlags(PRInt32 aFlags)
+{
+  mVFlags &= ~aFlags;
+  return NS_OK;
+}
+
 NS_IMETHODIMP nsView :: GetOffsetFromWidget(nscoord *aDx, nscoord *aDy, nsIWidget *&aWidget)
 {
   nsIView   *ancestor;
diff --git a/mozilla/view/src/nsView.h b/mozilla/view/src/nsView.h
index cb83285ad55..23900f59e17 100644
--- a/mozilla/view/src/nsView.h
+++ b/mozilla/view/src/nsView.h
@@ -94,6 +94,7 @@ public:
   NS_IMETHOD  GetWidget(nsIWidget *&aWidget);
   virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
   NS_IMETHOD SetViewFlags(PRInt32 aFlags);
+  NS_IMETHOD ClearViewFlags(PRInt32 aFlags);
 
   // Helper function to get the view that's associated with a widget
   static nsIView*  GetViewFor(nsIWidget* aWidget);