> Only ask for 'is modified' if the local file is 
older 
> then x days (or even better has not been checked be 
> httrack for x hours or days). x should be 
configurable 
> in hours or days and a file matching mask. E.g. in 
an 
> web archive, html files change very often linking to 
> ZIP or JPG files which usually never chanve.

Might be interesting - but the "update hack" feature 
should then work, isn't it?