MadMonkey: well, in libre-office it might be still more or less an office file, so to make sure it isnt that i would still try the .pdf (there are several freeware options in the www that do this job)
(esconder) Mantenha a sua Caixa de Mensagens limpa, Arquivando mensagens importantes e usando regularmente a opção "Apagar TODAS as Mensagens". (pauloaguia) (mostrar todas as dicas)