Index: export/views_bonus_export.module
===================================================================
--- export/views_bonus_export.module	(revision 493)
+++ export/views_bonus_export.module	(working copy)
@@ -115,10 +115,14 @@
 
   foreach ($vars['themed_rows'] as $num => $row) {
     foreach ($row as $field => $content) {
-      $vars['themed_rows'][$num][$field] = str_replace(
-        array('&', '<', '>'),
-        array('&amp;', '&lt;', '&gt;'),
+      // Prevent double encoding of the ampersand. Look for the entities produced by check_plain().
+      $content = preg_replace('/&(?!(amp|quot|#039|lt|gt);)/', '&amp;', $content);
+      // Convert < and > to HTML entities.
+      $content = str_replace(
+        array('<', '>'),
+        array('&lt;', '&gt;'),
         $content);
+      $vars['themed_rows'][$num][$field] = $content;
     }
   }
 }