Currently, I'm not using the debian package. When it hits 
stable, I'll probably reinstall httrack.

I checked and I'm running the same version of bash.

% echo $0
-bash
$ which bash
/bin/bash
$ /bin/bash --help
GNU bash, version 2.05a.0(1)-release-(i386-pc-linux-gnu)

Here is what I've been testing with:

% httrack <http://www.zeuscat.com> -
O /home/buildsite/test_spiders/zeuscat -q -%F '' -*.gif -
*.jpg
...
% httrack --quiet --update

For some reason, after the update, I'm still getting double 
quotes inside the html files.

Here's the command from doit.log:
<http://www.zeuscat.com> -
O /home/buildsite/test_spiders/zeuscat -q -%F "" -*.gif -
*.jpg