diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20ff297..1897120 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,6 @@ All notable changes to WuttJamaican 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).
 
-## v0.28.8 (2026-02-25)
-
-### Fix
-
-- diff should use "intersection" of fields by default
-
 ## v0.28.7 (2026-02-17)
 
 ### Fix
diff --git a/pyproject.toml b/pyproject.toml
index 08ea1d5..1cd82a5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "WuttJamaican"
-version = "0.28.8"
+version = "0.28.7"
 description = "Base package for Wutta Framework"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@wuttaproject.org"}]
diff --git a/src/wuttjamaican/diffs.py b/src/wuttjamaican/diffs.py
index 47db028..38e4214 100644
--- a/src/wuttjamaican/diffs.py
+++ b/src/wuttjamaican/diffs.py
@@ -83,11 +83,7 @@ class Diff:  # pylint: disable=too-many-instance-attributes
             self.cell_padding = cell_padding
 
     def make_fields(self):  # pylint: disable=missing-function-docstring
-        if self.old_data and self.new_data:
-            fields = set(self.old_data) & set(self.new_data)
-        else:
-            fields = set(self.old_data or self.new_data)
-        return sorted(fields, key=lambda f: f.lower())
+        return sorted(set(self.old_data) | set(self.new_data), key=lambda x: x.lower())
 
     def render_html(self, template=None, **kwargs):
         """
diff --git a/tests/test_diffs.py b/tests/test_diffs.py
index dfb4452..32dedeb 100644
--- a/tests/test_diffs.py
+++ b/tests/test_diffs.py
@@ -19,20 +19,13 @@ class TestDiff(ConfigTestCase):
         self.assertEqual(diff.cell_padding, "0.5rem")
 
     def test_make_fields(self):
-
-        # should return "sorted intersection" of fields
-        old_data = {"foo": "bar", "baz": "abc"}
-        new_data = {"foo": "bar", "baz": "xyz", "flurg": "foo"}
+        old_data = {"foo": "bar"}
+        new_data = {"foo": "bar", "baz": "zer"}
         # nb. this calls make_fields()
         diff = self.make_diff(old_data, new_data)
+        # TODO: should the fields be cumulative? or just use new_data?
         self.assertEqual(diff.fields, ["baz", "foo"])
 
-        # all fields are used if only one data set
-        diff = self.make_diff(old_data, {})
-        self.assertEqual(diff.fields, ["baz", "foo"])
-        diff = self.make_diff({}, new_data)
-        self.assertEqual(diff.fields, ["baz", "flurg", "foo"])
-
     def test_values(self):
         old_data = {"foo": "bar"}
         new_data = {"foo": "baz"}