loggintoboogan_destination does not redirect to custom homepage

Our setup:

1. I set a custom front page under /admin/settings. (e.g. "overview")
2. This page is only viewable to authenticated users.
3. Logintoboggan is set to present login form on access denied (403)
4. After login user should get redirectet to the custom front page

If you start with
www.example.com/overview
everything is fine.

If you start with
www.example.com/
you get www.example.com/node

I change line 619 in loggintoboggan.module
from
$destination = 'node';
to
$destination = variable_get('site_frontpage', 0);

Everything is fine again.

Thanks for the great module!