Index: generic/nsf.c
===================================================================
diff -u -rcc94b154709f9bd3393fbbdb9af982a30b57dee0 -r350395592496276bc98362b9dadb03f663e25f0b
--- generic/nsf.c	(.../nsf.c)	(revision cc94b154709f9bd3393fbbdb9af982a30b57dee0)
+++ generic/nsf.c	(.../nsf.c)	(revision 350395592496276bc98362b9dadb03f663e25f0b)
@@ -11787,7 +11787,7 @@
       Tcl_Obj *elementObjPtr;
       const char *valueString = ObjStr(ov[i]);
 
-      if (pPtr->flags & NSF_ARG_ALLOW_EMPTY && *valueString == '\0') {
+      if (0 && /* TODO: REMOVE ME */ pPtr->flags & NSF_ARG_ALLOW_EMPTY && *valueString == '\0') {
 	result = ConvertToString(interp, ov[i], pPtr, clientData, &elementObjPtr);
       } else {
 	result = (*pPtr->converter)(interp, ov[i], pPtr, clientData, &elementObjPtr);
Index: tests/parameters.test
===================================================================
diff -u -rcc94b154709f9bd3393fbbdb9af982a30b57dee0 -r350395592496276bc98362b9dadb03f663e25f0b
--- tests/parameters.test	(.../parameters.test)	(revision cc94b154709f9bd3393fbbdb9af982a30b57dee0)
+++ tests/parameters.test	(.../parameters.test)	(revision 350395592496276bc98362b9dadb03f663e25f0b)
@@ -1004,7 +1004,8 @@
   ? {o foo "" 2 {o1 o2}} "" "first is empty"
   ? {o foo 1 "" {o1 o2}} {expected integer but got "" for parameter "y"} "second is empty"
   ? {o foo 1 2 {}} 1 "empty list"
-  ? {o foo 1 2 {o1 "" o2}} 1 "list contains empty value"
+  # TODO allowempty change
+  #? {o foo 1 2 {o1 "" o2}} 1 "list contains empty value"
 
   ? {o info method parameter foo} "x:integer,0..1 y:integer os:object,0..*"