Various things work better / worse in various versions of Acrobat. Such as the measurement tool doesn't work at all in any version other than 8. I use that a lot, so I'm stuck on 8.

The OCR in version 8 works very well, you might give that a try.

BTW, the last version of acrobat that had a decent print to pdf utility was 4. I still use 4 for printing.