Index: /trunk/src/org/openstreetmap/josm/tools/PlatformHookWindows.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/tools/PlatformHookWindows.java	(revision 12320)
+++ /trunk/src/org/openstreetmap/josm/tools/PlatformHookWindows.java	(revision 12321)
@@ -297,7 +297,10 @@
         StringBuilder sb = new StringBuilder();
         try {
-            sb.append(getProductName()).append(' ')
-              .append(getReleaseId()).append(" (")
-              .append(getCurrentBuild()).append(')');
+            sb.append(getProductName());
+            String releaseId = getReleaseId();
+            if (releaseId != null) {
+                sb.append(' ').append(releaseId);
+            }
+            sb.append(" (").append(getCurrentBuild()).append(')');
         } catch (ReflectiveOperationException e) {
             Main.error(e);