Have you tried other PDF readers? Searched for Linux-based PDF indexers?
As I said in another topic, I am totally okay for free stuff (if it was
not the case, I would not be using Debian: thinking unfree but using
free is cowardice), but the fact is that I have not found a reader whose
range of compatibility with the PDF standard is as high as in acroread.
Acroread is slow, boring, sometimes buggy, but I need to use it as long
as I do not find a PDF reader which has such a big compatibility range.