Index: sharethis.js
===================================================================
--- sharethis.js	(revision 414)
+++ sharethis.js	(working copy)
@@ -7,15 +7,19 @@
   // Process each element.
   if (Drupal.settings.sharethis) {
     jQuery.each(Drupal.settings.sharethis, function(id, options) {
+      var element = document.getElementById(id);
+      if (!element) {
+        return;
+      }
       var shared_object = SHARETHIS.addEntry({
         title: options['title'],
         url: options['url']
       });
       if (options['chicklet'] || false) {
-        shared_object.attachChicklet(options['chicklet'], document.getElementById(id));
+        shared_object.attachChicklet(options['chicklet'], element);
       }
       else {
-        shared_object.attachButton(document.getElementById(id), {button: false});
+        shared_object.attachButton(element, {button: false});
       }
       $('#' + id).click(function() { return false; });
       delete(Drupal.settings.sharethis[id]);