builder fail

gistfile1.txt

ruby-1.8.7-p302 > require 'builder'
 => true 
ruby-1.8.7-p302 > xm = Builder::XmlMarkup.new
 => <inspect/> 
ruby-1.8.7-p302 > xm.title('yada')
 => "<inspect/><title>yada</title>" 
ruby-1.8.7-p302 > puts xm
TypeError: Builder::XmlMarkup#to_ary should return Array
	from (irb):5:in `puts'
	from (irb):5
ruby-1.8.7-p302 > xm
 => <inspect/><title>yada</title><respond_to?:to_ary/><to_ary/><inspect/> 
ruby-1.8.7-p302 > xm
 => <inspect/><title>yada</title><respond_to?:to_ary/><to_ary/><inspect/><inspect/> 
ruby-1.8.7-p302 > xm
 => <inspect/><title>yada</title><respond_to?:to_ary/><to_ary/><inspect/><inspect/><inspect/>