--- a/integration/js/segmentapi-serializer.js	Wed Dec 05 15:39:12 2012 +0100
+++ b/integration/js/segmentapi-serializer.js	Thu Dec 06 12:38:34 2012 +0100
@@ -16,7 +16,7 @@
             _ann.description = _s.abstract;
             _ann.begin = new IriSP.Model.Time(_s.start_ts);
             _ann.end = new IriSP.Model.Time(_s.start_ts + _s.duration);
-            _ann.keywords = _s.tags.split(",");
+            _ann.keywords = (_s.tags ? _s.tags.split(",") : []);
             _ann.project_id = _s.project_id;
             _annotationlist.push(_ann);
         }