Steps to reproduce:
1. Open Nautilus
2. "File" -> "Connect to Server"
3. On the window appearing configure:
Service Type: Windows share
Server: <samba server>
Share: <username>
Folder: /
User name: <username>
Domain name: <domainname>
4. "Connect"
5. Click the Icon in Nautilus' "Computer"-place.

Stack trace:
===== BEGIN MILESWGNES =====
0x8174a70 2008/04/09 16:59:31.7173 (USER): debug log dumped due to signal 11
===== END MILESWGNES =====
===== BEGIN RING BUFFER =====
0x8174a70 2008/04/09 16:59:22.1144 (USER): window 0x8200018 open location: old="(none)", new="x-nautilus-desktop:"
0x8174a70 2008/04/09 16:59:22.3464 (USER): create new navigation window=0x83d0000
0x8174a70 2008/04/09 16:59:22.3465 (USER): window 0x83d0000 open location: old="(none)", new="file:///home/username"
0x8174a70 2008/04/09 16:59:24.4447 (USER): finished loading window 0x83d0000: file:///home/username
0x8174a70 2008/04/09 16:59:24.4478 (USER): finished loading window 0x8200018: x-nautilus-desktop:
0x8174a70 2008/04/09 16:59:24.4830 (USER): change view of window 0x83d0000: "file:///home/username" to "OAFIID:Nautilus_File_Manager_Icon_View"
0x8174a70 2008/04/09 16:59:26.0904 (USER): window 0x83d0000 open location: old="file:///home/username", new="computer:"
0x8174a70 2008/04/09 16:59:26.0905 (USER): finished loading window 0x83d0000: file:///home/username
0x8174a70 2008/04/09 16:59:26.3681 (USER): change view of window 0x83d0000: "computer:" to "OAFIID:Nautilus_File_Manager_Icon_View"
0x8174a70 2008/04/09 16:59:26.4559 (USER): finished loading window 0x83d0000: computer:
0x8174a70 2008/04/09 16:59:31.4276 (USER): selection changed in window 0x83d0000
	computer:///Topalis%2520Home.volume
0x8174a70 2008/04/09 16:59:31.4578 (USER): fm_directory_view_activate_files window=0x83d0000
	computer:///Topalis%2520Home.volume
0x8174a70 2008/04/09 16:59:31.4866 (USER): directory view open_location window=0x83d0000: smb://WG%3Busername@cifs.server/username
0x8174a70 2008/04/09 16:59:31.4867 (USER): window 0x83d0000 open location: old="computer:", new="smb://WG%3Busername@cifs.server/username"
0x8174a70 2008/04/09 16:59:31.4867 (USER): finished loading window 0x83d0000: computer:
0x8174a70 2008/04/09 16:59:31.7173 (USER): debug log dumped due to signal 11
===== END RING BUFFER =====


This configuration for the debug log can be re-created
by putting the following in ~/nautilus-debug-log.conf
(use ';' to separate domain names):


[debug log]
max lines=1000

Other information:
I'm running a Debian SID, the Samba server is a Debian Stable.