Selection in PDF files

I'm working on an ebook conversion script.

When I create a PDF file using emacs ps-print-buffer-with-faces and then ps2pdf, I can select the words one by one on my ebook (Sony PRS 600). Same when I use Microsoft Word to print to PD开发者_StackOverflowF.

Yet, when I create a PDF using pdflatex, or latex -> dvips -> ps2pdf, I can't select but blocks of words, separated by punctuation signs.

It seems that there is something in the structure of the PDF files generated by latex that ebooks don't understand -- but what?

Do you know a switch to tell latex to behave properly, or a workaround?

Thanks!

CFP.

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Latex doesn't use a white space character to separate words. That's the problem.