> So when i order HTTrack to update the website, it won't 
> download those missing pictures at their correct size 
> (makes them all 1 kb).
> Even if i delete all those faulty 1 kb pictures, it 
> redownloads them at 1 kb size.

Even if you delete them?! Are these pictures dynamically 
generated ones (.php, .asp ..) ?
Can you activate in "Experts only" the "debug mode" 
checkbox ? Then, check the hts-ioinfo.txt generated file 
and search for an image name to see what happened between 
httrack and the server.