diff --git a/picard/coverart/__init__.py b/picard/coverart/__init__.py
index adc4e0d71..88f3eea1f 100644
--- a/picard/coverart/__init__.py
+++ b/picard/coverart/__init__.py
@@ -73,10 +73,10 @@ class CoverArt:
         else:
             log.debug("Cover art disabled by user options.")
 
-    def _set_metadata(self, coverartimage, data, info):
+    def _set_metadata(self, coverartimage, data, image_info):
         try:
             if coverartimage.can_be_processed:
-                run_image_processors(coverartimage, data, info)
+                run_image_processors(coverartimage, data, image_info)
             else:
                 coverartimage.set_tags_data(data)
             if coverartimage.can_be_saved_to_metadata:
@@ -119,12 +119,12 @@ class CoverArt:
                 echo=None
             )
             try:
-                info = imageinfo.identify(data)
+                image_info = imageinfo.identify(data)
                 filters_result = True
                 if coverartimage.can_be_filtered:
-                    filters_result = run_image_filters(data, info, self.album, coverartimage)
+                    filters_result = run_image_filters(data, image_info, self.album, coverartimage)
                 if filters_result:
-                    self._set_metadata(coverartimage, data, info)
+                    self._set_metadata(coverartimage, data, image_info)
             except (CoverArtImageIOError, imageinfo.IdentificationError):
                 # It doesn't make sense to store/download more images if we can't
                 # save them in the temporary folder, abort.
diff --git a/picard/ui/options/cover.py b/picard/ui/options/cover.py
index 2e630283c..6951fce0b 100644
--- a/picard/ui/options/cover.py
+++ b/picard/ui/options/cover.py
@@ -144,10 +144,18 @@ class CoverOptionsPage(OptionsPage):
         self.ui.ca_providers_groupbox.setEnabled(files_enabled or tags_enabled)
 
     def select_never_replace_image_types(self):
+        instructions_bottom = N_(
+            "Embedded cover art images with a type found in the 'Include' list will never be replaced "
+            "by a newly downloaded image UNLESS they also have an image type in the 'Exclude' list. "
+            "Images with types found in the 'Exclude' list will always be replaced by downloaded images "
+            "of the same type. Images types not appearing in the 'Include' or 'Exclude' list will "
+            "not be considered when determining whether or not to replace an embedded cover art image.\n"
+        )
         (included_types, excluded_types, ok) = CAATypesSelectorDialog.display(
             types_include=self.dont_replace_included_types,
             types_exclude=self.dont_replace_excluded_types,
             parent=self,
+            instructions_bottom=instructions_bottom,
         )
         if ok:
             self.dont_replace_included_types = included_types
diff --git a/picard/util/imagelist.py b/picard/util/imagelist.py
index d0b3df7cb..2a8ec7317 100644
--- a/picard/util/imagelist.py
+++ b/picard/util/imagelist.py
@@ -110,5 +110,5 @@ class ImageList(MutableSequence):
                 previous_image = types_dict[image_types]
                 if image.width > previous_image.width or image.height > previous_image.height:
                     continue
-            types_dict[image.normalized_types()] = image
+            types_dict[image_types] = image
         return types_dict