> Okay, figured out what happened: the default MIME types 
> were not correct in WinHTTrack. Do the following:
> 
> Set Options / MIME type:
> ERASE default settings! (which assumes php <-> text/html)
> This was the cause of your problems, I think.
> 
> Set options / Scan rules: add the followinf rule
> +*.pdf
> 
> I ran a small test and PDF files seems OK now.

I'm having this error message on a site I've mirrored too 
(www.learningpage.com). I tried these sugestions but the 
problem still exists. Is there a next step that has not 
been documented on this forum please?