one line of text corrupted in PS to Acrobat doc.

I'm using the latest version of PS to create a pitch deck. I'm using  a Typekit font and that's a whole other story. Anyway, when I output a Photoshop PDF and combine pages in Acrobat I get one line of text that has a slight blue tinge (very slight) and is a bit mealy.  Now this is not complety corrupted meaning it's readable but unnaceptable.  I have not optimized the PDF this is straight into Acrobat. I've tried setting the various output settings so that it's compatible with V5 or the latest version and with and without checking the editing option. I'm also getting slight banding on a solid BG without any gradient. Just a solid fill. I could see that this is probably a compression issue, but why onely one line of type has a  problem I don't understand. This is not a complex doc. I would add that it appears on every page and that's over to different blocks of type. The attached file shows the problem on the 7th line from the top: “... accurate understanding of...”  What gives?