-<%= image_tag(url_for(:controller => :traces, :action => :icon, :id => description.id, :display_name => description.user.display_name)) %>
+<%= image_tag trace_icon_path(description.user, description.id) %>
<% if description.size -%>
<%= t ".description_with_count", :count => description.size, :user => description.user.display_name %>
<% else -%>