Index: trunk/data/validator/geometry.mapcss
===================================================================
--- trunk/data/validator/geometry.mapcss	(revision 7279)
+++ trunk/data/validator/geometry.mapcss	(revision 7280)
@@ -28,5 +28,7 @@
 }
 
-area:closed:areaStyle.water_area ⧉ area:closed:areaStyle.water_area {
+/* area:closed:areaStyle.water_area ⧉ area:closed:areaStyle.water_area -- does not work for now -- see ticket#10215 */
+area:closed:areaStyle[natural =~ /^(water|wetland|coastline)$/] ⧉ area:closed:areaStyle.water_area,
+area:closed:areaStyle[landuse=reservoir]                        ⧉ area:closed:areaStyle.water_area {
   throwWarning: tr("Overlapping Water Areas");
 }