/Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/message.rb:1289:in `method_missing': undefined method `add_content_id' for #<Mail::Part:0x00000100c55f70> (NoMethodError)
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/attachments_list.rb:79:in `[]='
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/message.rb:1674:in `add_file' from mailer.rb:8:in `block (2 levels) in <main>'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/message.rb:130:in `instance_eval'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/message.rb:130:in `initialize'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/mail.rb:50:in `new'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/mail-2.3.0/lib/mail/mail.rb:50:in `new'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/ruby-gmail-0.2.1/lib/gmail.rb:82:in `deliver' from mailer.rb:4:in `block in <main>'
	from /Users/me/.rvm/gems/ruby-1.9.2-p0@rails3/gems/ruby-gmail-0.2.1/lib/gmail.rb:24:in `initialize'
	from mailer.rb:3:in `new'
	from mailer.rb:3:in `<main>'