diff -rupN wxWidgets-3.0.1/src/gtk/notebook.cpp wxWidgets-3.0.1-patched/src/gtk/notebook.cpp
--- wxWidgets-3.0.1/src/gtk/notebook.cpp	2014-06-14 17:48:48.000000000 -0400
+++ wxWidgets-3.0.1-patched/src/gtk/notebook.cpp	2014-09-30 10:44:26.589330444 -0400
@@ -429,8 +429,9 @@ bool wxNotebook::InsertPage( size_t posi
     pageData->m_imageIndex = imageId;
 
     pageData->m_box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 1);
+#ifndef __WXGTK3__
     gtk_container_set_border_width(GTK_CONTAINER(pageData->m_box), 2);
-
+#endif
     pageData->m_image = NULL;
     if (imageId != -1)
     {