[VM] Text file attachment decoding in Presentation mode

[Yoshiharu Kohayakawa]

I have the following problem related to non-ASCII characters in
Presentation mode.

When a text file is attached to a message, then the text file is shown
in Presentation mode in full, but accented characters appear as octal
code.  (The main body of the message is fine.)

An example message is in the folder attachment_in_presentation, at

  http://www.ime.usp.br/~yoshi/TMP/VM/

A screen shot is also at this URL.

Any help would be most welcome.  Many thanks in advance! 

Yoshi

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Yoshiharu Kohayakawa