Index: trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java	(revision 9012)
+++ trunk/src/org/openstreetmap/josm/data/osm/visitor/paint/StyledMapRenderer.java	(revision 9016)
@@ -467,5 +467,5 @@
                     Shape clip = g.getClip();
                     g.clip(area);
-                    g.setStroke(new BasicStroke(2 * extent));
+                    g.setStroke(new BasicStroke(2 * extent, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER));
                     g.draw(area);
                     g.setClip(clip);
@@ -483,5 +483,5 @@
                 } else {
                     Shape clip = g.getClip();
-                    BasicStroke stroke = new BasicStroke(2 * extent);
+                    BasicStroke stroke = new BasicStroke(2 * extent, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER);
                     g.clip(stroke.createStrokedShape(area));
                     g.fill(area);