Index: /trunk/src/org/openstreetmap/josm/gui/layer/GeoImageLayer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/GeoImageLayer.java	(revision 1736)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/GeoImageLayer.java	(revision 1737)
@@ -686,5 +686,5 @@
                 Date time = new Date(tp.time.getTime() - (delta+gpstimezone));
                 if (time.after(e.time) && lastTP != null) {
-                    e.pos.setCoor(lastTP.pos.getCenter(tp.pos));
+                    e.pos = new CachedLatLon(lastTP.pos.getCenter(tp.pos));
                     break;
                 }