Index: trunk/src/org/openstreetmap/josm/data/projection/Projection.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/projection/Projection.java	(revision 4304)
+++ trunk/src/org/openstreetmap/josm/data/projection/Projection.java	(revision 4305)
@@ -14,5 +14,6 @@
 public interface Projection {
     /**
-     * Returns the default zoom scale in pixel per degree ({@see #NavigatableComponent#scale}))
+     * The default scale factor in east/north units per pixel ({@see #NavigatableComponent#scale}))
+     * FIXME: misnomer
      */
     double getDefaultZoomInPPD();
Index: trunk/src/org/openstreetmap/josm/gui/mappaint/LineElemStyle.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/mappaint/LineElemStyle.java	(revision 4304)
+++ trunk/src/org/openstreetmap/josm/gui/mappaint/LineElemStyle.java	(revision 4305)
@@ -53,5 +53,5 @@
         LineElemStyle casing =  createImpl(env, true);
         if (casing != null) {
-            casing.z_index = -100;
+            casing.z_index += -100;
             casing.isModifier = true;
         }