Steps to reproduce:
1. Start F-Spot
2. Attach & turn on camera
3. Select camera in import dialog



Stack trace:
gdb backtrace:

(gdb) bt full

+ Trace 71729

---Type <return> to continue, or q <return> to quit---

Similar info on the console from another system:

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

Stacktrace:

  at (wrapper managed-to-native) LibGPhoto2.PortInfoList.gp_port_info_list_load (System.Runtime.InteropServices.HandleRef) <0x00012>
  at (wrapper managed-to-native) LibGPhoto2.PortInfoList.gp_port_info_list_load (System.Runtime.InteropServices.HandleRef) <0xffffffff>
  at LibGPhoto2.PortInfoList.Load () <0x00037>
  at GPhotoCamera..ctor () <0x0005c>
  at SourceMenu..ctor (ImportCommand) <0x004ec>
  at ImportCommand.ImportFromFile (PhotoStore,string) <0x00231>
  at MainWindow.HandleImportCommand (object,System.EventArgs) <0x00080>
  at (wrapper delegate-invoke) System.MulticastDelegate.invoke_void_object_EventArgs (object,System.EventArgs) <0xffffffff>
  at GLib.Signal.voidObjectCallback (intptr,intptr) <0x000d4>
  at (wrapper native-to-managed) GLib.Signal.voidObjectCallback (intptr,intptr) <0xffffffff>
  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0x0000b>
  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0xffffffff>
  at Gtk.Application.Run () <0x00008>
  at Gnome.Program.Run () <0x0000c>
  at FSpot.Driver.Main (string[]) <0x0086e>
  at (wrapper runtime-invoke) System.Object.runtime_invoke_void_string[] (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        mono(mono_handle_native_sigsegv+0xe2) [0x502932]
        mono [0x4d03dd]
        /lib/libpthread.so.0 [0x2aafecd8c2a0]
        /usr/lib/libdbus-1.so.3(dbus_pending_call_get_completed+0x11) [0x2aaaabada961]
        /usr/lib/libdbus-1.so.3 [0x2aaaabace8b6]
        /usr/lib/libdbus-1.so.3(dbus_connection_send_with_reply_and_block+0x73) [0x2aaaabacee13]
        /usr/lib/libhal.so.1(libhal_find_device_by_capability+0xc0) [0x2aaab5a6ec20]
        /usr/lib/libgphoto2_port/0.6.1/disk.so(gp_port_library_list+0xc0) [0x2aaab59510a0]
        /usr/lib/libgphoto2_port.so.0 [0x2aaab56e4b11]
        /usr/lib/libgphoto2_port.so.0 [0x2aaab56e9696]
        /usr/lib/libgphoto2_port.so.0 [0x2aaab56e923e]
        /usr/lib/libgphoto2_port.so.0(gp_port_info_list_load+0x7d) [0x2aaab56e49dd]
        [0x406efb98]

Other information:
Crash occurs with F-Spot 0.2.0 on Ubuntu Edgy, with libgphoto2 2.2.1, and dbus 0.92

This appears to be related to issues with newer versions of dbus & applications not initialising dbus threading lately. I have tried calling dbus_g_thread_init() in src/Main.cs, but with no effect.