Switch to side-by-side view

--- a/website/BUGS.html
+++ b/website/BUGS.html
@@ -39,9 +39,18 @@
 
         <ul> 
 
-	  <li>The operations on the parent document in the result list
-	    right click menu (Preview and Open), do not work, they
-	    access the file's parent directory instead.</li>
+        <li>Using search preview while the indexing thread is running will
+          sometimes crash the GUI or provoke other strangeness. This
+          is due to insufficient protection of resources shared by
+          several threads. The current and unsatisfying workaround, is
+          to avoid the situation, for example by using the standalone
+          recollindex program instead of the GUI indexing thread. I
+          will be working on a program-wide cleanup of multithreaded
+          operation for the next version.</li>
+
+        <li>The operations on the parent document in the result list
+	  right click menu (Preview and Open), do not work, they
+	  access the file's parent directory instead.</li>
 
         <li>The rclzip filter can't handle utf-8 in path names for archive
         members. An  <a