I have the same problem.

It happens with 3.40 (Debian Etch) and 3.42.3 (Ubuntu Intrepid)

It stop on these debug messages :

11:28:47	Debug: 	link detected in html (tag):
<http://developer.gnome.org/doc/API/>
11:28:47	Debug: 	position link check <http://developer.gnome.org/doc/API/>
11:28:47	Debug: 	build relative link <http://developer.gnome.org/doc/API/> with
ruby-gnome2.sourceforge.jp/hiki.cgi?Ruby-GNOME2+API+Reference
11:28:47	Debug: 	built relative link <http://developer.gnome.org/doc/API/> with
ruby-gnome2.sourceforge.jp/hiki.cgi?Ruby-GNOME2+API+Reference ->
developer.gnome.org/doc/API/
11:28:47	Debug: 	wizard link test at developer.gnome.org/doc/API/..
11:28:47	Debug: 	wizard test begins: developer.gnome.org/doc/API/
11:28:47	Debug: 	Compare addresses:
developer.gnome.org!=ruby-gnome2.sourceforge.jp