I want to be able to post-process Httrack runs to see what 
content is new by examining file timestamps. To do this 
I've tried to use the cache options -C1 and -C2 which is 
supposed to issue the If-modified-since header, only 
downloading new content.

I've monitored the HTTP exchanges and this isn't being 
issued so I always download content - is there something 
wrong with my command line?
httrack.exe <http://www.foo.com>  -O "/myDir"  --skeleton -
C2 -q --depth=2  -%q0 -%c2 -M100000000 -a --ext-depth=0 

Thanks for any help and keep up the good work!
Mark