Index: trunk/data/validator/geometry.mapcss
===================================================================
--- trunk/data/validator/geometry.mapcss	(revision 9506)
+++ trunk/data/validator/geometry.mapcss	(revision 9540)
@@ -212,2 +212,7 @@
   throwWarning: tr("node connects waterway and bridge");
 }
+
+way[junction=roundabout]:righthandtraffic:clockwise,
+way[junction=roundabout]!:righthandtraffic:anticlockwise {
+  throwWarning: tr("suspicious roundabout direction");
+}