I've seen that happen, but only once. Essentially, you have a corrupt
record. I treated it as if I had a corrupted db and imported all objects
into a new, blank, db. The corrupt record did not survive the import
process, which was fine.
Corrupt Microsoft Access MDBs FAQ
http://www.granite.ab.ca/access/corruptmdbs.htm
Preventing corruption
http://allenbrowne.com/ser-25.html
Recovering from corruption
http://allenbrowne.com/ser-47.html
A quick glance indicates that neither source specifically lists your case as
a "symptom" of a corrupt db. All I can say is that I would treat it as such.

Signature
HTH,
George
> Can someone help me figure out why one of the records in a table in my
> Access
[quoted text clipped - 8 lines]
> value has been converted to foreign characters. How can I keep this from
> occurring in the future?