> me too, the 3.21 crashes in XP.
> so i returnd to httrack-3.20-2.exe

Is httrack crashing for all sites? Or certain sites only? 
Are the crashes "random" or always happend on certain 
sites ? (did you try "Continue an interrupted mirror" ?)

Please mail me the details at roche@httrack.com ; I'll try 
to find the problem asap.