Hi there,

   Whoops! I'm not too surprised, because even though the newer PDF specification does support transparencies, the Postscript language (the output from the virtual printer before conversion to PDF) does not support transparencies.

   The program will try to "simulate" the transparency by converting your object to a bitmap and putting "holes" in the bitmap to partly show the stuff behind. Note that this method may significantly increase the size of your PDF.

   To answer your question: there is no solution (apart from manually editing the PDF), and I would recommend that you turn off the transparency. An alternative is to use a solid text border, but with a transparent tect body, OR to place the Word Art behind the material, with no transparency, but you could select a lighter color. Those are less-than-ideal work arounds that might give a similar result to what you are looking for.

   Cheers!

Michel.