Index: trunk/resources/data/validator/deprecated.mapcss
===================================================================
--- trunk/resources/data/validator/deprecated.mapcss	(revision 17122)
+++ trunk/resources/data/validator/deprecated.mapcss	(revision 17153)
@@ -2094,3 +2094,14 @@
 }
 
+/* #17809 */
+*[Fixme] {
+  throwWarning: tr("{0} is deprecated", "{0.key}");
+  suggestAlternative: "fixme";
+  group: tr("deprecated tagging");
+  fixChangeKey: "Fixme => fixme";
+  assertMatch: "way Fixme=foo";
+  assertNoMatch: "way fixme=foo";
+  assertNoMatch: "way FIXME=foo";
+}
+
 /* When tags are deprecated they should be added to ignoretags.cfg too. */