Steps to reproduce:

 - open source file under SVN version control
 - Team > Show Annotations
 - right click revision in annotation
 - select "Diff to previous Revision" 
 - graphical view off diff is empty (when it should not)
 - textual view of diff just shows empty diff  (when it should not):

# This patch file was generated by NetBeans IDE
# It uses platform neutral UTF-8 encoding and \n newlines.
--- 12113
+++ 12114

Showing the diff using "Search History ..." works fine:

# This patch file was generated by NetBeans IDE
# It uses platform neutral UTF-8 encoding and \n newlines.
--- 12113
+++ 12114
@@ -1,5 +1,6 @@
 package nionexa;
 
+import com.nionex.ops.bean.BeanUtil;
 import com.nionex.ops.bean.request.DocumentRequestBean;
 import com.nionex.ops.callback.PageCallback;
 import com.nionex.ops.callback.PreparablePageCallbackHandler;
@@ -1073,6 +1074,9 @@
         }
 
         try {
+            // immer aufrufen, um Besuchsplanung zu initialisieren
+            BeanUtil.getBean(FragmentAktivitaeten.class).initPlaner(planer);
+
             //Zieladresse Langtext aus Kresetabelle ermitteln
             String zieladresseOrt = KreiseService.getKreiseOrt(HibernateUtil.getCurrentSession(), planer.getVmPkreis(), planer.getVmPland());
             input_ZieladresseOrt.setValue(zieladresseOrt);



Product Version = NetBeans IDE 7.0 RC1 (Build 201103280000)
Operating System = Windows XP version 5.1 running on x86
Java; VM; Vendor = 1.6.0_21
Runtime = Java HotSpot(TM) Client VM 17.0-b16