Index: trunk/src/org/openstreetmap/josm/actions/CreateMultipolygonAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/CreateMultipolygonAction.java	(revision 8384)
+++ trunk/src/org/openstreetmap/josm/actions/CreateMultipolygonAction.java	(revision 8385)
@@ -261,5 +261,7 @@
     @Override
     protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
-        if (update) {
+        if (getCurrentDataSet() == null) {
+            setEnabled(false);
+        } else if (update) {
             setEnabled(getSelectedMultipolygonRelation() != null);
         } else {
Index: trunk/src/org/openstreetmap/josm/gui/mappaint/StyleCache.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/mappaint/StyleCache.java	(revision 8384)
+++ trunk/src/org/openstreetmap/josm/gui/mappaint/StyleCache.java	(revision 8385)
@@ -213,5 +213,5 @@
         if (bd.size() != data.size() + 1) throw new AssertionError();
         if (bd.get(0) != 0) throw new AssertionError();
-        if (!Utils.equalsEpsilon(bd.get(bd.size() - 1), Double.POSITIVE_INFINITY)) throw new AssertionError();
+        if (bd.get(bd.size() - 1) != Double.POSITIVE_INFINITY) throw new AssertionError();
         for (int i=0; i<data.size() - 1; ++i) {
             if (bd.get(i) >= bd.get(i + 1)) throw new AssertionError();
Index: trunk/src/org/openstreetmap/josm/tools/Utils.java
===================================================================
--- trunk/src/org/openstreetmap/josm/tools/Utils.java	(revision 8384)
+++ trunk/src/org/openstreetmap/josm/tools/Utils.java	(revision 8385)
@@ -973,5 +973,5 @@
         // Is it less than 1 minute ?
         if (elapsedTime < MILLIS_OF_MINUTE) {
-            return String.format("%.1d %s", elapsedTime / (double) MILLIS_OF_SECOND, tr("s"));
+            return String.format("%.1f %s", elapsedTime / (double) MILLIS_OF_SECOND, tr("s"));
         }
         // Is it less than 1 hour ?