Index: trunk/resources/data/validator/deprecated.mapcss
===================================================================
--- trunk/resources/data/validator/deprecated.mapcss	(revision 16185)
+++ trunk/resources/data/validator/deprecated.mapcss	(revision 16316)
@@ -1967,2 +1967,16 @@
   group: tr("deprecated tagging");
 }
+
+node[amenity=bench][capacity][!seats],
+way[amenity=bench][capacity][!seats] {
+  throwWarning: tr("{0} is deprecated for {1}", "{1.key}", "{0.tag}");
+  suggestAlternative: "seats";
+  group: tr("deprecated tagging");
+  fixChangeKey: "capacity => seats";
+}
+node[amenity=bench][capacity][seats],
+way[amenity=bench][capacity][seats] {
+  throwWarning: tr("{0} is deprecated for {1}", "{1.key}", "{0.tag}");
+  suggestAlternative: "seats";
+  group: tr("deprecated tagging");
+}