The regular expressions extracting preseed_path and preseed_server in lib/family.rb fail on installation sources which contain a port (e.g. http://example.com:8080/path/).

Calls to http://localhost:3000/unattended/preseed generate the following back trace:

Processing UnattendedController#preseed (for 127.0.0.1 at 2010-05-03 10:18:34) [GET]
  Parameters: {"action"=>"preseed", "controller"=>"unattended", "spoof"=>"127.0.0.1"}
  Host Load (0.6ms)   SELECT * FROM "hosts" WHERE (ip = '127.0.0.1') LIMIT 1
  Architecture Load (0.2ms)   SELECT * FROM "architectures" WHERE ("architectures"."id" = 1)
  Media Load (0.2ms)   SELECT * FROM "medias" WHERE ("medias"."id" = 3)
  Operatingsystem Load (0.3ms)   SELECT * FROM "operatingsystems" WHERE ("operatingsystems"."id" = 1)
  Domain Load (0.3ms)   SELECT * FROM "domains" WHERE ("domains"."id" = 1)

NoMethodError (You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]):
  lib/family.rb:24:in `preseed_path'
  app/controllers/unattended_controller.rb:29:in `preseed'
  /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
  /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
  /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
  /usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
  /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
  /usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
  /usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
  /usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
  /usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
  /usr/lib/ruby/1.8/webrick/server.rb:82:in `start'

Rendered rescues/_trace (25.1ms)
Rendered rescues/_request_and_response (1.1ms)
Rendering rescues/layout (internal_server_error)

The attached patch file contains a fix for this issue by replacing the regular expressions with the respective calls to the URI class which is part of the Ruby standard library.