Index: trunk/src/org/openstreetmap/josm/gui/MapStatus.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/MapStatus.java	(revision 12862)
+++ trunk/src/org/openstreetmap/josm/gui/MapStatus.java	(revision 12863)
@@ -1014,5 +1014,5 @@
      * @param text The text
      */
-    public void setHelpText(Object id, final String text) {
+    public synchronized void setHelpText(Object id, final String text) {
         StatusTextHistory entry = new StatusTextHistory(id, text);
 
@@ -1030,5 +1030,5 @@
      * @param id The id passed to {@link #setHelpText(Object, String)}
      */
-    public void resetHelpText(Object id) {
+    public synchronized void resetHelpText(Object id) {
         if (statusText.isEmpty())
             return;