diff -Naur Amaya-11.13.1/thotlib/dialogue/AmayaPage.cpp Amaya-11.13.1-local/thotlib/dialogue/AmayaPage.cpp
--- Amaya-11.13.1/thotlib/dialogue/AmayaPage.cpp	2009-09-09 03:11:03.000000000 -0700
+++ Amaya-11.13.1-local/thotlib/dialogue/AmayaPage.cpp	2010-07-01 21:20:30.000000000 -0700
@@ -383,7 +383,7 @@
 					    /*| wxSP_PERMIT_UNSPLIT*/
 #endif /* 0 */
 					    );
-  SetSplitMode(0); // undefined
+  SetSplitMode(wxSPLIT_VERTICAL); // undefined not allowed
   p_sizerTop2->Add( m_pSplitterWindow, 1, wxEXPAND, 0 );