See if this KB article applies:
WD2000: Symbol Characters Change to Box Characters
http://support.microsoft.com/kb/212396/en-us
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Stefan Blom
Microsoft Word MVP
"tess" wrote:
A letter written in Word 2000 appears as gibberish. I tried to select all
text and choose a different font, however that does not change the
hierogliphycs into readable text. What to do?