diff --git a/common.py b/common.py
index 5689498..62b5fba 100644
--- a/common.py
+++ b/common.py
@@ -417,9 +417,9 @@ def postprocess_as2(activity, user=None, target=None, create=True):
     # copy image(s) into attachment(s). may be Mastodon-specific.
     # https://github.com/snarfed/bridgy-fed/issues/33#issuecomment-440965618
     obj_or_activity = obj if isinstance(obj, dict) else activity
-    img = obj_or_activity.get('image')
+    img = util.get_list(obj_or_activity, 'image')
     if img:
-        obj_or_activity.setdefault('attachment', []).append(img)
+        obj_or_activity.setdefault('attachment', []).extend(img)
 
     # cc target's author(s) and recipients
     # https://www.w3.org/TR/activitystreams-vocabulary/#audienceTargeting
diff --git a/tests/test_common.py b/tests/test_common.py
index dd37c96..c089a9b 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -110,6 +110,18 @@ class CommonTest(testutil.TestCase):
                 'url': ['foo', 'bar'],
             }, user=User(id='foo.com')))
 
+    def test_postprocess_as2_multiple_image(self):
+        with app.test_request_context('/'):
+            self.assert_equals({
+                'id': 'http://localhost/r/xyz',
+                'attachment': [{'url': 'http://r/foo'}, {'url': 'http://r/bar'}],
+                'image': [{'url': 'http://r/foo'}, {'url': 'http://r/bar'}],
+                'to': [as2.PUBLIC_AUDIENCE],
+            }, common.postprocess_as2({
+                'id': 'xyz',
+                'image': [{'url': 'http://r/foo'}, {'url': 'http://r/bar'}],
+            }, user=User(id='foo.com')))
+
     def test_postprocess_as2_actor_attributedTo(self):
         with app.test_request_context('/'):
             self.assert_equals({
diff --git a/webmention.py b/webmention.py
index 8cdc25d..5dfd37e 100644
--- a/webmention.py
+++ b/webmention.py
@@ -231,9 +231,9 @@ class Webmention(View):
                     },
                 )
                 # not actually an error
-                msg = ("Updating profile on followers' instances"
+                msg = ("Updating profile on followers' instances..."
                        if self.source_url.strip('/') == f'https://{self.source_domain}'
-                       else 'Delivering to followers')
+                       else 'Delivering to followers...')
                 error(msg, status=202)
 
             inboxes = set()