> Bogus URL?> But httrack only follows links as a browser would do -- 
> even filling referer information in headers, so this is a 
> bit strange. A filtere against offline browsers might 
also 
> be the cause.

I take it a website can employ a filter to prevent copiers 
like HTTrack from functioning.  How do they do that if the 
copier or Offline Browser is mimicing a user?  Where could 
I go to learn more about website administration and 
management and the specific use of such filters?  Are these 
filters commercially available or built in to server 
software?