My solution has been to individually extract all those pages, then open them up in Photoshop, flatten them and
widen the canvas size to standard 8.5 x 11.
But that's a little tedious and time-consuming and you have to delete the original page from your document, after
importing the OCR-friendly page.
Is there a printer definition, or something you can set up when you're generating your PDF's in the first place,
that will get rid of that annoying "renderable text" error?