Index: win32ss/user/ntuser/nonclient.c
===================================================================
--- win32ss/user/ntuser/nonclient.c	(revision 72214)
+++ win32ss/user/ntuser/nonclient.c	(working copy)
@@ -390,6 +390,10 @@
       if (!co_IntGetPeekMessage(&msg, 0, 0, 0, PM_REMOVE, TRUE)) break;
       if (IntCallMsgFilter( &msg, MSGF_SIZE )) continue;
 
+      /* Disable menu activation via keyboard */
+      if (msg.message == WM_SYSKEYDOWN ||
+          msg.message == WM_SYSKEYUP) continue;
+
       /* Exit on button-up, Return, or Esc */
       if ((msg.message == WM_LBUTTONUP) ||
 	  ((msg.message == WM_KEYDOWN) &&