Index: trunk/src/org/openstreetmap/josm/data/Preferences.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/Preferences.java	(revision 18291)
+++ trunk/src/org/openstreetmap/josm/data/Preferences.java	(revision 18292)
@@ -683,5 +683,5 @@
      */
     @Override
-    public synchronized boolean putSetting(final String key, Setting<?> setting) {
+    public boolean putSetting(final String key, Setting<?> setting) {
         CheckParameterUtil.ensureParameterNotNull(key);
         if (setting != null && setting.getValue() == null)