Originally Posted by macropod

You could 'print' to a PDF...

Regardless, given that the problem persists when you open the document on a different computer, that suggests some kind of table corruption. Saving the document in RTF format, closing, the opening and making a minor edit to the RTF document before saving & closing it, then re-opening & saving back to the original format might resolve the problem. Some table corruption problems, though, can only be resolved by re-creating the table.