Index: trunk/src/org/openstreetmap/josm/gui/dialogs/UserListDialog.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/UserListDialog.java	(revision 2070)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/UserListDialog.java	(revision 2073)
@@ -201,5 +201,5 @@
             User user = (User)infoObject;
             try {
-                return getBaseUserUrl() + "/" + URLEncoder.encode(user.getName(), "UTF-8");
+                return getBaseUserUrl() + "/" + URLEncoder.encode(user.getName(), "UTF-8").replaceAll("\\+", "%20");
             } catch(UnsupportedEncodingException e) {
                 e.printStackTrace();