Dimension style fill color causing random lines on pdf files

Using Autocad 2014. I recently changed our dimension style fill color to background.  Now when we create pdf files, there are random lines either to left of the text or left and top of text. It is not every dimension. We had it set to none before and would trim lines around dimension text. We did not have problems with pdf until changing the fill color. It plots from autocad to plotter without a problem.

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