Subform - unreadable headings/data

[jody]

Hi,

Unreadable characters are showing in the headings as well
as the datasheet of a couple of my subforms. What is
interesting is that:

1. This is not happening to all the subforms in my
application, only 2 out of 5; and

2. This does not happen at all on some of the
installations of Access that I have used to test my
application - all the subforms are perfectly
readable.

All of the installations are Access 2002. Anyone know
why there is a difference? What can I do to rectify this?

Thanks,
jody