Index: trunk/src/org/openstreetmap/josm/data/osm/FilterModel.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/FilterModel.java	(revision 14275)
+++ trunk/src/org/openstreetmap/josm/data/osm/FilterModel.java	(revision 14276)
@@ -254,5 +254,5 @@
      */
     public boolean moveUpFilter(int rowIndex) {
-        if (rowIndex == 0)
+        if (rowIndex <= 0 || rowIndex >= filters.size())
             return false;
         filters.add(rowIndex - 1, filters.remove(rowIndex));