>Thanks, it turned out that a shape inside the container (where the textboxes were) was causing this problem...is there a good reason why it does this?
No, not a good reason. It's a minor bug. I just answered this about two days ago, in fact - try putting some code somewhere (maybe form Init) like this:
shape.backcolor = textbox.backcolor
The Anonymous Bureaucrat,
and frankly, quite content not to be
a member of either major US political party.