From: Artur Merke [mailto:am / artbot.de] 
# > does anybody know a quick fix to the DateTime or Yaml  bug
# >
# > YAML::load(DateTime.now.to_yaml).class
# > => Time

cannot help you, but only say that i can replicate the behaviour here too. someone complained too http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/262969

i think it's a bug. stick to marshall in the meantime.

kind regards -botp