diff --git a/src/static/js/contentcollector.js b/src/static/js/contentcollector.js
index 048ed4915..1268e279c 100644
--- a/src/static/js/contentcollector.js
+++ b/src/static/js/contentcollector.js
@@ -32,7 +32,7 @@ var _ = require('./underscore');
 
 function sanitizeUnicode(s)
 {
-  return UNorm.nfc(s).replace(/[\uffff\ufffe\ufeff\ufdd0-\ufdef\ud800-\udfff]/g, '?');
+  return UNorm.nfc(s);
 }
 
 function makeContentCollector(collectStyles, browser, apool, domInterface, className2Author)