Index: trunk/src/org/openstreetmap/josm/gui/io/UploadDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/io/UploadDialog.java	(revision 17337)
+++ trunk/src/org/openstreetmap/josm/gui/io/UploadDialog.java	(revision 17339)
@@ -349,5 +349,5 @@
             String hashtags = dataSet.getChangeSetTags().get("hashtags");
             if (hashtags != null) {
-                for (String hashtag : hashtags.split(";")) {
+                for (String hashtag : hashtags.split(";", -1)) {
                     String sanitizedHashtag = hashtag.startsWith("#") ? hashtag : "#" + hashtag;
                     if (!result.contains(sanitizedHashtag)) {