It's not working. I've tried it again, it always shows me th content warning.

Here's what I did using doc40.blogspot.com:
I used the proxy to get the URL:

<http://doc40.blogspot.com/2012/01/national-elf-service.html?guestAuth=MJ4o0TYBAAA.tj8rPjKQLvfGQhqn0cNnrQ.4GJOd2kn4nVFlFbUVadnRA?>postfile:C:\temp\Websites\doc40.blogspot.com\doc40.blogspot.com\hts-post0>

Log file line 2:
(winhttrack -qwC2%Ps2u1%s%uN0%I0p3DaK0H0%kf2A25000%f#f -F "Mozilla/4.0
(compatible; MSIE 6.0; Windows NT 5.0)" -%F "<!-- Mirrored from %s%s by
HTTrack Website Copier/3.x [XR&CO'2010], %s -->" -%l "en, en, *"
<http://doc40.blogspot.com/2012/01/national-elf-service.html?guestAuth=MJ4o0TYBAAA.tj8rPjKQLvfGQhqn0cNnrQ.4GJOd2kn4nVFlFbUVadnRA?>postfile:C:\temp\Websites\doc40.blogspot.com\doc40.blogspot.com\hts-post0>
-O1 C:\temp\Websites\doc40.blogspot.com\doc40.blogspot.com +*.css +*.js
-ad.doubleclick.net/* -mime:application/foobar +*.gif +*.jpg +*.png +*.tif
+*.bmp +*.zip +*.tar +*.tgz +*.gz +*.rar +*.z +*.exe +*.mov +*.mpg +*.mpeg
+*.avi +*.asf +*.mp3 +*.mp2 +*.rm +*.wav +*.vob +*.qt +*.vid +*.ac3 +*.wma
+*.wmv )

I downloaded the site, opened it and I saw the form/content warning. I'm
clueless...