Fixes.

src/main/java/ch/psi/mxsc/MainPanel.java

@@ -256,15 +256,25 @@ public class MainPanel extends Panel {
             Controller.getInstance().onTimer();
             if (getState() == State.Ready) {
                 if (Boolean.TRUE.equals(Controller.getInstance().isPuckLoading())) {
-                    getContext().setPreference(ViewPreference.STATUS, PUCK_LOADING_STATUS);                    
+                    setStatus(PUCK_LOADING_STATUS);                    
                 } else {                    
-                    getContext().setPreference(ViewPreference.STATUS, "Ready");
+                    setStatus("Ready");
                 }
+            } else {
+                status = null;
             }
         } catch (Exception ex) {
             getLogger().log(Level.WARNING, null, ex);
         }            
     }
+    
+    String status;
+    void setStatus (String status){
+        if (!status.equals(this.status)){
+            getContext().setPreference(ViewPreference.STATUS, status);
+            this.status = status;
+        }
+    }
 
     void refresh() {
         if (!SwingUtilities.isEventDispatchThread()){