diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9202116..46b6dac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,16 +5,6 @@ All notable changes to wuttaweb will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## v0.29.2 (2026-03-10)
-
-### Fix
-
-- add base class for `WuttaList` schema type
-- skip custom rendering for missing grid columns
-- serialize None to null, for ObjectRef schema type
-- improve JSON-safe rendering for sets
-- make empty <select> option work better for WuttaDictEnum
-
 ## v0.29.1 (2026-03-04)
 
 ### Fix
diff --git a/pyproject.toml b/pyproject.toml
index 2613603..2fa4ee9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "WuttaWeb"
-version = "0.29.2"
+version = "0.29.1"
 description = "Web App for Wutta Framework"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@wuttaproject.org"}]
diff --git a/src/wuttaweb/forms/schema.py b/src/wuttaweb/forms/schema.py
index 6deb56d..20f957b 100644
--- a/src/wuttaweb/forms/schema.py
+++ b/src/wuttaweb/forms/schema.py
@@ -205,23 +205,17 @@ class WuttaDictEnum(colander.String):
     """
 
     def __init__(self, request, enum_dct, *args, **kwargs):
-        self.null_value = kwargs.pop("null_value", "")
         super().__init__(*args, **kwargs)
         self.request = request
         self.config = self.request.wutta_config
         self.app = self.config.get_app()
         self.enum_dct = enum_dct
 
-    def serialize(self, node, appstruct):
-        if appstruct is colander.null:
-            return self.null_value
-        return super().serialize(node, appstruct)
-
     def widget_maker(self, **kwargs):  # pylint: disable=empty-docstring
         """ """
         if "values" not in kwargs:
             kwargs["values"] = list(self.enum_dct.items())
-        kwargs.setdefault("null_value", self.null_value)
+
         return widgets.SelectWidget(**kwargs)
 
 
@@ -280,59 +274,13 @@ class WuttaQuantity(colander.Decimal):
         return self.app.render_quantity(appstruct)
 
 
-class WuttaList(colander.List):
-    """
-    Custom schema type for :class:`python:list` fields; this is a
-    subclass of :class:`colander.List`.
-
-    :param request: Current :term:`request` object.
-
-    As of now this merely provides a way (in fact, requires you) to
-    pass the request in, so it can be leveraged as needed.  Instances
-    of this type will have the following attributes:
-
-    .. attribute:: request
-
-       Reference to the current :term:`request`.
-
-    .. attribute:: config
-
-       Reference to the app :term:`config object`.
-
-    .. attribute:: app
-
-       Reference to the :term:`app handler` instance.
-    """
-
-    def __init__(self, request):
-        super().__init__()
-        self.request = request
-        self.config = self.request.wutta_config
-        self.app = self.config.get_app()
-
-
 class WuttaSet(colander.Set):
     """
-    Custom schema type for :class:`python:set` fields; this is a
-    subclass of :class:`colander.Set`.
+    Custom schema type for :class:`python:set` fields.
+
+    This is a subclass of :class:`colander.Set`.
 
     :param request: Current :term:`request` object.
-
-    As of now this merely provides a way (in fact, requires you) to
-    pass the request in, so it can be leveraged as needed.  Instances
-    of this type will have the following attributes:
-
-    .. attribute:: request
-
-       Reference to the current :term:`request`.
-
-    .. attribute:: config
-
-       Reference to the app :term:`config object`.
-
-    .. attribute:: app
-
-       Reference to the :term:`app handler` instance.
     """
 
     def __init__(self, request):
@@ -403,17 +351,15 @@ class ObjectRef(colander.SchemaType):
 
     def serialize(self, node, appstruct):  # pylint: disable=empty-docstring
         """ """
-        # normalize to empty option if no object ref, so that works as
-        # expected
+        # nb. normalize to empty option if no object ref, so that
+        # works as expected
         if self.empty_option and not appstruct:
             return self.empty_option[0]
 
-        # even if there is no empty option, still treat any false-ish
-        # value as null
-        if not appstruct:
+        if appstruct is colander.null:
             return colander.null
 
-        # keep a ref to this for later use
+        # nb. keep a ref to this for later use
         node.model_instance = appstruct
 
         # serialize to PK as string
diff --git a/src/wuttaweb/grids/base.py b/src/wuttaweb/grids/base.py
index 1906997..2ac2646 100644
--- a/src/wuttaweb/grids/base.py
+++ b/src/wuttaweb/grids/base.py
@@ -2515,10 +2515,8 @@ class Grid:  # pylint: disable=too-many-instance-attributes,too-many-public-meth
 
             # customize value rendering where applicable
             for key, renderer in self.renderers.items():
-                # nb. no need to render if column not included
-                if key in self.columns:
-                    value = record.get(key, None)
-                    record[key] = renderer(original_record, key, value)
+                value = record.get(key, None)
+                record[key] = renderer(original_record, key, value)
 
             # add action urls to each record
             for action in self.actions:
diff --git a/src/wuttaweb/util.py b/src/wuttaweb/util.py
index a708398..1080820 100644
--- a/src/wuttaweb/util.py
+++ b/src/wuttaweb/util.py
@@ -654,13 +654,6 @@ def make_json_safe(value, key=None, warn=True):
             parent[i] = make_json_safe(v, key=key, warn=warn)
         value = parent
 
-    elif isinstance(value, set):
-        # recursively convert set (as list)
-        parent = list(value)
-        for i, v in enumerate(parent):
-            parent[i] = make_json_safe(v, key=key, warn=warn)
-        value = parent
-
     elif isinstance(value, _uuid.UUID):
         # convert UUID to str
         value = value.hex
diff --git a/tests/forms/test_schema.py b/tests/forms/test_schema.py
index d6b7420..6c587fb 100644
--- a/tests/forms/test_schema.py
+++ b/tests/forms/test_schema.py
@@ -153,20 +153,6 @@ MOCK_STATUS = {
 
 class TestWuttaDictEnum(WebTestCase):
 
-    def test_serialize(self):
-
-        # null_value is empty string by default
-        typ = mod.WuttaDictEnum(self.request, MOCK_STATUS)
-        node = colander.SchemaNode(typ)
-        self.assertEqual(typ.serialize(node, 1), "1")
-        self.assertEqual(typ.serialize(node, colander.null), "")
-
-        # but can override if needed (?)
-        typ = mod.WuttaDictEnum(self.request, MOCK_STATUS, null_value="nope")
-        node = colander.SchemaNode(typ)
-        self.assertEqual(typ.serialize(node, 1), "1")
-        self.assertEqual(typ.serialize(node, colander.null), "nope")
-
     def test_widget_maker(self):
         typ = mod.WuttaDictEnum(self.request, MOCK_STATUS)
         widget = typ.widget_maker()
@@ -198,26 +184,6 @@ class TestWuttaMoney(WebTestCase):
         self.assertEqual(widget.scale, 4)
 
 
-class TestWuttaList(WebTestCase):
-
-    def test_constructor(self):
-        node = colander.SchemaNode(mod.WuttaList(self.request))
-        typ = node.typ
-        self.assertIs(typ.request, self.request)
-        self.assertIs(typ.config, self.config)
-        self.assertIs(typ.app, self.app)
-
-
-class TestWuttaSet(WebTestCase):
-
-    def test_constructor(self):
-        node = colander.SchemaNode(mod.WuttaSet(self.request))
-        typ = node.typ
-        self.assertIs(typ.request, self.request)
-        self.assertIs(typ.config, self.config)
-        self.assertIs(typ.app, self.app)
-
-
 class TestWuttaQuantity(WebTestCase):
 
     def test_serialize(self):
@@ -277,8 +243,6 @@ class TestObjectRef(DataTestCase):
         typ = mod.ObjectRef(self.request)
         value = typ.serialize(node, colander.null)
         self.assertIs(value, colander.null)
-        value = typ.serialize(node, None)
-        self.assertIs(value, colander.null)
 
         # model instance
         person = model.Person(full_name="Betty Boop")
diff --git a/tests/grids/test_base.py b/tests/grids/test_base.py
index 15a7a06..1e193ea 100644
--- a/tests/grids/test_base.py
+++ b/tests/grids/test_base.py
@@ -1985,13 +1985,11 @@ class TestGrid(WebTestCase):
 
         # typical data is a list
         mydata = [
-            {"foo": "bar", "baz": "zoo"},
+            {"foo": "bar"},
         ]
-        grid = self.make_grid(columns=["foo", "baz"], data=mydata)
+        grid = self.make_grid(columns=["foo"], data=mydata)
         context = grid.get_vue_context()
-        self.assertEqual(
-            context, {"data": [{"foo": "bar", "baz": "zoo"}], "row_classes": {}}
-        )
+        self.assertEqual(context, {"data": [{"foo": "bar"}], "row_classes": {}})
 
         # non-declared columns are discarded
         mydata = [
@@ -2003,47 +2001,27 @@ class TestGrid(WebTestCase):
 
         # if grid has actions, that list may be supplemented
         mydata = [
-            {"foo": "bar", "baz": "zoo"},
+            {"foo": "bar"},
         ]
-        grid = self.make_grid(columns=["foo", "baz"], data=mydata)
+        grid = self.make_grid(columns=["foo"], data=mydata)
         grid.actions.append(mod.GridAction(self.request, "view", url="/blarg"))
         context = grid.get_vue_context()
         self.assertIsNot(context["data"], mydata)
         self.assertEqual(
             context,
-            {
-                "data": [{"foo": "bar", "baz": "zoo", "_action_url_view": "/blarg"}],
-                "row_classes": {},
-            },
+            {"data": [{"foo": "bar", "_action_url_view": "/blarg"}], "row_classes": {}},
         )
 
         # can override value rendering
-        renderer = MagicMock(return_value="blah blah")
-        grid.set_renderer("foo", renderer)
+        grid.set_renderer("foo", lambda record, key, value: "blah blah")
         context = grid.get_vue_context()
         self.assertEqual(
             context,
             {
-                "data": [
-                    {"foo": "blah blah", "baz": "zoo", "_action_url_view": "/blarg"}
-                ],
+                "data": [{"foo": "blah blah", "_action_url_view": "/blarg"}],
                 "row_classes": {},
             },
         )
-        renderer.assert_called_once_with({"foo": "bar", "baz": "zoo"}, "foo", "bar")
-
-        # custom rendering skipped if column not included
-        grid.remove("foo")
-        renderer.reset_mock()
-        context = grid.get_vue_context()
-        self.assertEqual(
-            context,
-            {
-                "data": [{"baz": "zoo", "_action_url_view": "/blarg"}],
-                "row_classes": {},
-            },
-        )
-        renderer.assert_not_called()
 
         # can set row class
         grid.row_class = "whatever"
@@ -2051,7 +2029,7 @@ class TestGrid(WebTestCase):
         self.assertEqual(
             context,
             {
-                "data": [{"baz": "zoo", "_action_url_view": "/blarg"}],
+                "data": [{"foo": "blah blah", "_action_url_view": "/blarg"}],
                 "row_classes": {"0": "whatever"},
             },
         )
diff --git a/tests/test_util.py b/tests/test_util.py
index b9c7490..0be2911 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -735,30 +735,6 @@ class TestMakeJsonSafe(TestCase):
             ],
         )
 
-    def test_set(self):
-        model = self.app.model
-        person = model.Person(full_name="Betty Boop")
-
-        data = {
-            "foo",
-            "bar",
-            person,
-        }
-
-        self.assertRaises(TypeError, json.dumps, data)
-        value = mod.make_json_safe(data)
-        self.assertNotIsInstance(value, set)
-        self.assertIsInstance(value, list)
-        # nb. must sort values, otherwise comparison may fail
-        self.assertEqual(
-            sorted(value),
-            [
-                "Betty Boop",  # nb. upper-case sorts first
-                "bar",
-                "foo",
-            ],
-        )
-
 
 class TestRenderVueFinalize(TestCase):