I have a form with multiple check boxes inserted from the Forms toolbar.
When inserted, they appear as red (all other text is black), then when the
form is protected and reopened on a different computer, they appear as green
or purple and when the user tries to check them, the box disappears, even
though the form is still locked. (Text fields on the form work fine.)

Any clues? I don't have any macros running with this form. The check boxes
are in columns (that section is 3 columns wide).

Thanks - Neil