Index: /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java	(revision 1733)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java	(revision 1734)
@@ -485,5 +485,5 @@
                                             hdop = 0;
                                         }
-                                        int hdoplvl = Math.round(hdop * 25);
+                                        int hdoplvl = Math.round(hdop * Main.pref.getInteger("hdop.factor", 25));
                                         // High hdop is bad, but high values in colors are green.
                                         // Therefore inverse the logic