Given the changing colors especially, it sounds as if the check boxes may
have been inserted with Track Changes turned on. If this seems likely,
unprotect the document, accept all the changes in the document, and turn
Track Changes off and see if that helps.

--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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all may benefit.

"NCI Neil" NCI wrote in message
...
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