Index: trunk/src/org/openstreetmap/josm/gui/MapView.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/MapView.java	(revision 10897)
+++ trunk/src/org/openstreetmap/josm/gui/MapView.java	(revision 10898)
@@ -1278,4 +1278,5 @@
         }
         nonChangedLayersBuffer = null;
+        offscreenBuffer = null;
     }