diff --git a/doc/upgrade-1.1.txt b/doc/upgrade-1.1.txt
index 743bfc31..134c9a19 100644
--- a/doc/upgrade-1.1.txt
+++ b/doc/upgrade-1.1.txt
@@ -338,6 +338,15 @@ to upgrade your theme to VIVO 1.1.
            not be concerned with the Programmer's Guide or Java API documentation.
 
         c. Remove the jsp directory from your themes directory.
+        
+    3. VIVO 1.1 includes changes to vivo-basic stylesheets. If you modified 
+       styles in your VIVO 1.0 theme, you will not be able to simply copy the  
+       1.0 stylesheets into your 1.1 theme, because you will then lose 1.1 
+       style upgrades that your theme should pick up.  Instead, you should 
+       use the vivo-basic 1.1 stylesheets as a starting point, and manually
+       merge your 1.0 style modifications in as appropriate.
+
+