Index: simulation/index.html
===================================================================
--- simulation/index.html	(revision 8848)
+++ simulation/index.html	(revision 8849)
@@ -16,7 +16,8 @@
 	     additional extras (such as mixed analog-digital and behavioral
 	     simulation by merging xspice and CIDER).
 	<li> gnucap: independent implementation; may run faster than ngspice;
-	     no mixed analog/digital support in sch-rnd.
+	     no mixed analog/digital support in sch-rnd. Not recommended
+	     because of various problems in compatibility and stability.
 	<li> xyce: should work but is not tested with sch-rnd at the moment.
 </ul>
 <p>