If you really want to help fixing OCR errors, check out "Distributed Proofreaders":
http://www.pgdp.net/c/
It's a spin off of "Project Gutenberg" where people proofread scanned public domain texts (amongst others from the "Internet Archive"). You will process one page after another and more experienced users will check the work of beginners.
Since 2000 more than 21,600 books have been uploaded to Project Gutenberg.
Bye, Andreas