[Samba] Strange changes to a Word document

[Sheila Ebbutt]

Dear Andrew Tridgell

A strange thing happened last night. I was working on a Word document. I
scrolled up to the top of the document, and the first section had been
replaced by the following text, all formatted exactly as I had set it:

  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:25, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:26, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:27, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:28, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:29, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:30, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:30, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:31, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:33, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:33, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/02/21 23:50:34, 0]
/SourceCache/samba/samba-59/samba/source/smbd/server.c:main(757)
  smbd version 3.0.5 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2004
[2005/k them to read their Œwriting¹ to you, even if it is a series of marks
that you don¹t understand.

I¹ve highlighted in red where my own text suddenly starts.

I ran Norton Anti-virus through the machine, but no virus was spotted.

I use an iMac, OSX, 10.3.7.

How can this have happened? How do I get my text back (doubt that I can)?
How do I stop this happening again?

Any clues?

Sheila Ebbutt