Index: trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java	(revision 9124)
+++ trunk/src/org/openstreetmap/josm/data/projection/CustomProjection.java	(revision 9125)
@@ -110,4 +110,6 @@
         /** indicate southern hemisphere for UTM */
         south("south", false),
+        /** vertical units - ignore, as we don't use height information */
+        vunits("vunits", true),
         // JOSM extensions, not present in PROJ.4
         wmssrs("wmssrs", true),