> I'm having HTTrack hang at various seemingly random 
times. 
> It doesn't seem to be with any particular site or after 
any
> particular amount of time (5 hours, several days, it
> varies).  If I do ^C and then Cancel, it starts running
> again as if nothing had happened.

Darn.. if you could catch it with gdb, it would be great 
(if you have a version with debug symbols!)

$ gdb httrack
(gdb) set args www.example.com
(gdb) run
..
^C
(gdb) where
(..stack info)
(gdb) info threads
(..threads info)