Index: /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java	(revision 649)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java	(revision 650)
@@ -302,9 +302,11 @@
                         }
                     }
-                    DateFormat df = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT);
-                    info.append(tr("Timespan: ") + df.format(new Date((long)(earliest.time * 1000))) + " - " + df.format(new Date((long)(latest.time * 1000))));
-                    int diff = (int)(latest.time - earliest.time);
-                    info.append(" (" + (diff / 3600) + ":" + ((diff % 3600)/60) + ")");
-                    info.append("<br>");
+                    if(earliest != null && latest != null){
+                        DateFormat df = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT);
+                        info.append(tr("Timespan: ") + df.format(new Date((long)(earliest.time * 1000))) + " - " + df.format(new Date((long)(latest.time * 1000))));
+                        int diff = (int)(latest.time - earliest.time);
+                        info.append(" (" + (diff / 3600) + ":" + ((diff % 3600)/60) + ")");
+                        info.append("<br>");
+                    }
                 }
                 info.append(tr("Length: ") + new DecimalFormat("#0.00").format(data.length() / 1000) + "km");