Yellow boxes appear around some text when printing from ID to acrobat

Yellow boxes highlight some of the text I've created in InDesign. I'm not sure why they are there on some items but not others. I think it has to do with my have modified the text in some way - changing the background color, or shifting the row of text up or down. My problem is that these yellow text box outlines are printed when make the pdf. I cannot find a setting in Acrobat to turn this off. I've never had this problem before. Any help would be appreciated.