Strange white boxes behind text. Help!

I am in the middle of working on a very important document. In one section, an autobiographical section, I added sidbars. The background of text box is grey. Everything looked great, including when I printed last. Today when I was working on the document, I noticed that the headings (in the text box sidebars) have white behind the text. I tried troubleshooting:

I thought maybe there was a font trouble? tried changing fonts.

I thought maybe it was text box fill problem? changed colors of font and text box fill... No go.

Please ignore the terrible black boxes. I chose to black-out any personal data. The problem is the strange white boxes behind the headings (in the sidebar). Any ideas?