Thanks! When I convert the jp2k file for that page 58 with ABBYY default ("balanced") jbig2 settings I don't get any of the errors we see in the examples. If

Thanks! When I convert the jp2k file for that page 58 with ABBYY default ("balanced") jbig2 settings I don't get any of the errors we see in the examples. If I convert to DJVU and purposefully degrade the image to 150DPI, I still don't get the errors on display in this example. Besides the errors talked about in your linked discussion (germauic), the pdf clearly has many 'c' -> 'e' errors which aren't in the jp2k files. Again, I can't reproduce this with the software I use. I've also extensively used djvulibre and you just don't see errors like this from clean scans. So, I have to conclude that the original conversions were done with very aggressive settings (or very bad jbig2 implementations). If that's they way the internet archive did all its encodings, then I admit there must be several problem documents, and they should re-do the conversions from the original JP2k files they seem to have kept. Not sure if google books made similar mistakes.