Index: app/views/issues/_history.html.erb
===================================================================
--- app/views/issues/_history.html.erb	(revision 14637)
+++ app/views/issues/_history.html.erb	(working copy)
@@ -13,7 +13,17 @@
        <li><%= string %></li>
       <% end %>
     </ul>
+    <% if Setting.thumbnails_enabled? %>
+      <% thumbnail_attachments = journal.details.map{|d| d.property == 'attachment' and !d.value.blank? and Attachment.find_by_id(d.prop_key)}.select{|a| a and a.thumbnailable? } %>
+      <% if thumbnail_attachments.any? %>
+        <div class="thumbnails">
+          <% thumbnail_attachments.each do |attachment| %>
+          <div><%= thumbnail_tag(attachment) %></div>
+          <% end %>
+        </div>
+      <% end %>
     <% end %>
+    <% end %>
     <%= render_notes(issue, journal, :reply_links => reply_links) unless journal.notes.blank? %>
     </div>
   </div>
Index: public/stylesheets/application.css
===================================================================
--- public/stylesheets/application.css	(revision 14637)
+++ public/stylesheets/application.css	(working copy)
@@ -590,7 +590,8 @@
 
 div.thumbnails {margin-top:0.6em;}
 div.thumbnails div {background:#fff;border:2px solid #ddd;display:inline-block;margin-right:2px;}
-div.thumbnails img {margin: 3px;}
+div.thumbnails img {margin: 3px; vertical-align: middle;}
+ #history div.thumbnails {margin-left: 2em;}
 
 p.other-formats { text-align: right; font-size:0.9em; color: #666; }
 .other-formats span + span:before { content: "| "; }