Does it also print like that? If not, it's probably a display driver problem that can be fixed by updating it from the maker's website. Alternatively, it could be a corrupt Tahoma font file (that's the default font for the text in such objects) or a corrupt document. Corrupt documents can often be 'repaired' by inserting a new, empty, paragraph at the very end, copying everything except that new paragraph to a new document based on the same template, closing the old document and saving the new one over it.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]