Index: data/tagchecker.cfg
===================================================================
--- data/tagchecker.cfg	(revision 4280)
+++ data/tagchecker.cfg	(working copy)
@@ -74,6 +74,6 @@
 
 node : I : amenity == /restaurant|cafe|fast_food/ && name != * # restaurant without name
 #way  : I : highway != * && railway != * && waterway != * && name == * # unusual named way type
-#*    : W : natural == water && waterway == *                   # unusual tag combination
-*    : W : highway == * && waterway == *                       # unusual tag combination
-*    : W : highway == * && natural == *                        # unusual tag combination
+#*    : W : natural == water && waterway == *                   # unusual tag combination (natural=water & waterway)
+*    : W : highway == * && waterway == *                       # unusual tag combination (highway & waterway)
+*    : W : highway == * && natural == *                        # unusual tag combination (highway & natural)