diff --git a/geometry.cpp b/geometry.cpp
--- a/geometry.cpp
+++ b/geometry.cpp
@@ -2006,8 +2006,8 @@
     if (resized) {
         if (oldClientSize != QSize(w,h))
             discardWindowPixmap();
-        emit geometryShapeChanged(this, geometryBeforeUpdateBlocking());
     }
+    emit geometryShapeChanged(this, geometryBeforeUpdateBlocking());
     addRepaintDuringGeometryUpdates();
     updateGeometryBeforeUpdateBlocking();
 
diff --git a/scene_opengl.cpp b/scene_opengl.cpp
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -2248,13 +2248,20 @@
     const QRectF outerRect(QPointF(-leftOffset(), -topOffset()),
                            QPointF(topLevel()->width() + rightOffset(), topLevel()->height() + bottomOffset()));
 
-    const int width = qMax(topLeft.width(), bottomLeft.width()) +
+    int width = qMax(topLeft.width(), bottomLeft.width()) +
                       qMax(top.width(), bottom.width()) +
                       qMax(topRight.width(), bottomRight.width());
-    const int height = qMax(topLeft.height(), topRight.height()) +
+    int height = qMax(topLeft.height(), topRight.height()) +
                        qMax(left.height(), right.height()) +
                        qMax(bottomLeft.height(), bottomRight.height());
 
+    //top/bottom borders were disabled, use the sides width
+    if (width == 0) {
+        width = left.width() + right.width();
+    }
+    if (height == 0) {
+        height = top.height() + bottom.height();
+    }
     qreal tx1(0.0), tx2(0.0), ty1(0.0), ty2(0.0);
 
     tx2 = topLeft.width()/width;
@@ -2355,14 +2362,22 @@
     const QSize topLeft(shadowPixmap(ShadowElementTopLeft).size());
     const QSize bottomRight(shadowPixmap(ShadowElementBottomRight).size());
 
-    const int width = qMax(topLeft.width(), bottomLeft.width()) +
+    int width = qMax(topLeft.width(), bottomLeft.width()) +
                       qMax(top.width(), bottom.width()) +
                       qMax(topRight.width(), bottomRight.width());
 
-    const int height = qMax(topRight.height(), topLeft.height()) +
+    int height = qMax(topRight.height(), topLeft.height()) +
                        qMax(left.height(), right.height()) +
                        qMax(bottomLeft.height(), bottomRight.height());
 
+    //top/bottom borders were disabled, use the sides width
+    if (width == 0) {
+        width = left.width() + right.width();
+    }
+    if (height == 0) {
+        height = top.height() + bottom.height();
+    }
+
     if (width == 0 || height == 0) {
         return false;
     }