Hello! I discover problem with ruby18-xmpp4r-0.3 and new ruby-1.8.6,1. The problem apply to Digest::MD5 (see http://svn.ruby-lang.org/repos/ruby/tags/v1_8_6/NEWS). This solve it: sasl.rb: 44c44 < Digest::MD5.new(Time.new.to_f.to_s).hexdigest --- > Digest::MD5.hexdigest(Time.new.to_f.to_s) Regards Vladimir Horak