Strange Boxes Showing up in InCopy

Hello! I'm new to InCopy, so this may be a simple and common problem some face. After placing some Word documents into InCopy, I'm getting this strange box with an x in it at the beginning of each line in the galley and story views. I've tried changing the font of those views, checking to see that I've stripped any remaining styles from Word, and formatting the Layout view with styles to rule out any overrides, but that strange box remains. Any help on this would be greatly appreciated!