Switch to side-by-side view

--- a/src/doc/user/usermanual.sgml
+++ b/src/doc/user/usermanual.sgml
@@ -1405,7 +1405,7 @@
         your settings). Restarting the search should then display the
         thumbnails.</para>
         
-        <para>There are also <ulink url="&WIKI;ResultThumbnails.wiki">some
+        <para>There are also <ulink url="&WIKI;ResultsThumbnails.wiki">some
           pointers about  thumbnail generation</ulink> on the &RCL; wiki.
           </para>