Well, I worked out a way around it.
I exported my 'cropped' to TIFF and then created a PDF with them again. After that, I ran OCR again. Ended up with about a 20 meg file but.. so it goes. Optimizing just makes it bigger at this point. But then I 'reduced PDF size' and it looked pretty rough on the computer, but looked good on the Kindle (and page turns weren't too slow.)
So... in conclusion:
- Scan text at 300dpi B&W
- Create PDF with images
- Crop whitespace
- Then go through and crop individual pages that extend beyond the text area (usually because of edges)
- Export to TIFF files again
- Create a NEW PDF with these files
- Run OCR & optimize
- Save a nice 'archive' copy
- Then 'Save As...' and setup a new file.
- Run 'Reduce File Size' at highest version interoperability (for me this was Adobe 8)
- Pop into Calibre, adjust metadata and put on Kindle
- Read, and bemoan your lack of Table of Contents because evidently Amazon doesn't actually use the features they create and realize what a stupid thing that was to leave out.
I think Foxit is PC only, so it wouldn't really help. I have to run Windows in emulation which is good enough for scanning, but any real work needs to be done in Mac mode - it's too aggravating otherwise.