Ticket #31972: 31972.patch

src/wp-admin/options-discussion.php

@@ -272 +272 @@
         $avatar_list .= "\n\t<label><input type='radio' name='avatar_default' id='avatar_{$default_key}' value='" . esc_attr($default_key) . "' {$selected}/> ";
 
         $avatar = get_avatar( $user_email, $size, $default_key );
-        $avatar_list .= preg_replace("/src='(.+?)'/", "src='\$1&amp;forcedefault=1'", $avatar);
+        $avatar = preg_replace( "/src='(.+?)'/", "src='\$1&amp;forcedefault=1'", $avatar );
+        $avatar = preg_replace( "/srcset='(.+?) 2x'/", "srcset='\$1&amp;forcedefault=1 2x'", $avatar );
+        $avatar_list .= $avatar;
 
         $avatar_list .= ' ' . $default_name . '</label>';
         $avatar_list .= '<br />';