> I have updated a backup of a site, more than once,
> and I noticed that many pages have changed the htm
> extension they have in the server to html, though
> not all of them (perhaps only the ones that are
> updated?) and possibly more files are renamed in
> each update.

Humm, httrack always attempt to give a proper extension to pages to be
browseable locally, and the html type for text/html is "html", not "htm", even
if "htm" would work too.

I'll try to fix this (rather small) issue.