Index: app/views/issues/index.html.erb
===================================================================
--- app/views/issues/index.html.erb	(revision 15287)
+++ app/views/issues/index.html.erb	(working copy)
@@ -79,7 +79,7 @@
   <h3 class="title"><%= l(:label_export_options, :export_format => 'CSV') %></h3>
   <%= form_tag(_project_issues_path(@project, :format => 'csv'), :method => :get, :id => 'csv-export-form') do %>
   <%= query_as_hidden_field_tags(@query) %>
-  <%= hidden_field_tag 'sort', params[:sort], :id => nil %>
+  <%= hidden_field_tag 'sort', @sort_criteria.to_param, :id => nil %>
   <p>
     <label><%= radio_button_tag 'csv[columns]', '', true %> <%= l(:description_selected_columns) %></label><br />
     <label><%= radio_button_tag 'csv[columns]', 'all' %> <%= l(:description_all_columns) %></label>