mailx command sends mail body as attachment (noname)

[Alexandre Magno]

See:

 - http://www.claudiokuenzler.com/blog/300/mailx-sends-noname-attachment-instead-of-text-in-mail-body

And my comments on Bug #1013922 :

 - https://bugs.launchpad.net/ubuntu/+source/bsd-mailx/+bug/1013922/comments/4
 - https://bugs.launchpad.net/ubuntu/+source/bsd-mailx/+bug/1013922/comments/5

Bob Bib (bobbib) advised me to report this bug (at https://bugs.launchpad.net/ubuntu/+source/bsd-mailx/+bug/1013922/comments/6).