> After downloading a site with multiple jpgs, trying to
> open the pictures results in failure.  What I have found
> is that HTTrack has changed the header information, and
> restoring a general jpg header resolves the problem.  The
> question is twofold.

??httrack shouldn't do that! What is the problem with the 
header? I strongly suspect that this problem is related to 
the way httrack handles keep-alive with some servers. Try 
to disable the keep-alive feature, and it may work (see 
in 'Set options' to disable this)