diff --git a/content/events/src/nsEventStateManager.cpp b/content/events/src/nsEventStateManager.cpp
index b7c89d0223e1..c016fb0afab4 100644
--- a/content/events/src/nsEventStateManager.cpp
+++ b/content/events/src/nsEventStateManager.cpp
@@ -1135,12 +1135,17 @@ nsEventStateManager::SetCursor(PRInt32 aCursor, nsIWidget* aWidget, PRBool aLock
   case NS_STYLE_CURSOR_E_RESIZE:
     c = eCursor_sizeWE;
     break;
-  //We don't have cursors defined for these in nsIWidget.  Need them to fix this.
-  case NS_STYLE_CURSOR_NE_RESIZE:
   case NS_STYLE_CURSOR_NW_RESIZE:
+    c = eCursor_sizeNW;
+    break;
   case NS_STYLE_CURSOR_SE_RESIZE:
+    c = eCursor_sizeSE;
+    break;
+  case NS_STYLE_CURSOR_NE_RESIZE:
+    c = eCursor_sizeNE;
+    break;
   case NS_STYLE_CURSOR_SW_RESIZE:
-    c = eCursor_select;
+    c = eCursor_sizeSW;
     break;
   }
 
diff --git a/layout/events/src/nsEventStateManager.cpp b/layout/events/src/nsEventStateManager.cpp
index b7c89d0223e1..c016fb0afab4 100644
--- a/layout/events/src/nsEventStateManager.cpp
+++ b/layout/events/src/nsEventStateManager.cpp
@@ -1135,12 +1135,17 @@ nsEventStateManager::SetCursor(PRInt32 aCursor, nsIWidget* aWidget, PRBool aLock
   case NS_STYLE_CURSOR_E_RESIZE:
     c = eCursor_sizeWE;
     break;
-  //We don't have cursors defined for these in nsIWidget.  Need them to fix this.
-  case NS_STYLE_CURSOR_NE_RESIZE:
   case NS_STYLE_CURSOR_NW_RESIZE:
+    c = eCursor_sizeNW;
+    break;
   case NS_STYLE_CURSOR_SE_RESIZE:
+    c = eCursor_sizeSE;
+    break;
+  case NS_STYLE_CURSOR_NE_RESIZE:
+    c = eCursor_sizeNE;
+    break;
   case NS_STYLE_CURSOR_SW_RESIZE:
-    c = eCursor_select;
+    c = eCursor_sizeSW;
     break;
   }
 
diff --git a/widget/public/nsIWidget.h b/widget/public/nsIWidget.h
index 5b8c0b128f00..05e6a14737f4 100644
--- a/widget/public/nsIWidget.h
+++ b/widget/public/nsIWidget.h
@@ -148,6 +148,11 @@ enum nsCursor {   ///(normal cursor,       usually rendered as an arrow)
                 eCursor_sizeWE,
                   ///(north/south sizing,  usually rendered as sizeWE rotated 90 degrees)
                 eCursor_sizeNS,
+                  ///(corner sizing)
+                eCursor_sizeNW,
+                eCursor_sizeSE,
+                eCursor_sizeNE,
+                eCursor_sizeSW,
                 eCursor_arrow_north,
                 eCursor_arrow_north_plus,
                 eCursor_arrow_south,
diff --git a/widget/src/gtk/nsWidget.cpp b/widget/src/gtk/nsWidget.cpp
index b83fe6e117af..2bc230115885 100644
--- a/widget/src/gtk/nsWidget.cpp
+++ b/widget/src/gtk/nsWidget.cpp
@@ -836,6 +836,13 @@ NS_IMETHODIMP nsWidget::SetCursor(nsCursor aCursor)
       case eCursor_sizeNS:
         newCursor = gdk_cursor_new(GDK_TCROSS);
         break;
+      
+      case eCursor_sizeNW:
+      case eCursor_sizeSE:
+      case eCursor_sizeNE:
+      case eCursor_sizeSW:
+        // XXX: these resize cursors need to be implemented
+        break;
 
       case eCursor_arrow_south:
       case eCursor_arrow_south_plus:
diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index 514313e5f8d4..16581da49157 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -1621,6 +1621,16 @@ NS_METHOD nsWindow::SetCursor(nsCursor aCursor)
       newCursor = ::LoadCursor(NULL, IDC_SIZENS);
       break;
 
+    case eCursor_sizeNW:
+    case eCursor_sizeSE:
+      newCursor = ::LoadCursor(NULL, IDC_SIZENWSE);
+      break;
+
+    case eCursor_sizeNE:
+    case eCursor_sizeSW:
+      newCursor = ::LoadCursor(NULL, IDC_SIZENESW);
+      break;
+
     case eCursor_arrow_north:
       newCursor = ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ARROWNORTH));
       break;