Redmine

In fact, this bug was fixed several weeks ago in the repository.
You can check out the latest source or wait for the next release
to have this fix.

To check out the source (you need the svn binaries):
svn checkout svn://rubyforge.org/var/svn/redmine/trunk

I think that the same "bug" is till unfixed enven in
the
repository. In fact when clicking the "Help" button
it is
redirecting to "/manual/#{lang}/#{template}" which
do not
include the host path (the problem is raisen only when
redmine is hosted in subdirectories), so if we trust on the
host name given in the settings, we could correct this by
substituting reirection in help_controller.rb by:

if template
      link = Setting.host_name
      redirect_to
"http://#{Setting.host_name}/manual/#{lang}/#{template}" 
;
    else
      redirect_to
"http://#{Setting.host_name}/manual/#{lang}/index.html" 
    end

I've fixed the help link (not exactly the way you propose).

Thanks

But why not to use the same way (request.relative_url_root)
for mail notification instead of asking host_name ?

Because request.relative_url_root doesn't give you a host name,
just a path.

So what do you say about:

url    = "http://"+request.domain+"/"

instead of:

url = "http://#{Setting.host_name}/"

It isn't from mailer.rb ( url =
"http://#{Setting.host_name}/") that we extract host
name ?