The following lines will crash or cause unexpected behavior from a RAILS app running w/ FCGI. Tested v0.6.2

$ grep -n puts *
id_resolver.rb:63:        
puts "Resolving references to #{object_type}"

rforce.rb:252:        
puts "\n\nSession timeout error - auto relogin activated"

sid_authentication_filter.rb:41:      
puts "Checking for the presence of a SID for [#{@@klasses.to_a.join(', ')}]"

sid_authentication_filter.rb:47:        
puts "asf_sid_authenticate(:sid => '#{sid}', :url => '#{api_server_url}')"