Fix filename for IE.

app/controllers/archives_controller.rb

@@ -227,7 +227,9 @@ class ArchivesController < ApplicationController
 					if (current_site.accessibility_mode rescue false)
 						render "redirect_to_file",:layout=>false
 					else
-						send_file(@path)
+						user_agent = request.user_agent.downcase
+						@escaped_file_name = user_agent.include?(/(msie|trident)/) ? CGI::escape(@filename) : @filename
+						send_file(@path, :type=>"application/octet-stream", :filename => @escaped_file_name, :x_sendfile=> true)
 					end
 				end
 			rescue