Drupal + G2: URL's incorrect

I'm trying to embed G2 in my Drupal 4.5.3 site (https://b-fly.homeip.net/drupal/ or https://b-fly.homeip.net/drupal/gallery), but I'm doing something terribly wrong (apparently). The URL's to photo's, images and albums are wrong, killing all functionality and looks. The URL's look like:

https://b-fly.homeip.net/https://b-fly.homeip.net/drupal/gallery/2001_Brazil/

or if I connect from the intranet:

http://donkey/https://b-fly.homeip.net/drupal/gallery/2001_Brazil/

Somehow, an additional https://b-fly.homeip.net/ gets included in all URL's. I have no idea how. I also cannot find any setting in Drupal or G2 where I have put the string https://b-fly.homeip.net/ (hardcoded).

Any thoughts?

I already disabled the URL rewrite/clean url's options in G2/Drupal, but this did not work.

Obviously, the standalone G2 works fine, as does Drupal.

Some system info:
Drupal version 4.5.3
Gallery version 2.0-1
Debian Sarge
Drupal: https://b-fly.homeip.net/drupal/
Gallery: https://b-fly.homeip.net/gallery2/
Embedded gallery: https://b-fly.homeip.net/drual/gallery/