Thank you for your post.
I am able to replicate the problem on both Mac 10.5.8, 10.6.4 and Windows XP SP3. It also doesn't matter if the repeating field is displayed horizontally or vertically. The border separating the repetitions will not display when printed.
I have forwarded your post along with my findings to our Development and Software Quality Assurance (Testing) departments for review and confirmation. When additional information becomes available, I will let you know.