System/OS description at the bottom.  This bug makes me revert to using gThumb to import photos from my digital camera.  I have actually never been able to import photos from my digital camera in f-spot which is now the immutable default in Ubuntu 8.04 Long Term Support.

Steps to reproduce:
1.  Plug Canon PowerShot G5 digital camera into USB port.
2.  "Camera Import" dialog opens saying "A camera has been detected.  There are photos on the camera.  Would you like to add these pictures to your album?"  Below this appears a checked check box beside the caption, "Always perform this action".  Below this the buttons "Ignore" and "Import Photos", from left to right.  Select "Import Photos".
3.  F-Spot starts and shows "Camera Selection" dialog with options:
Camera                            Port
Canon PowerShot G5 (normal mode)  usb:
Canon PowerShot G5 (normal mode)  usb:003,002

Below which appear the buttons "Cancel" and "OK".  Select one camera entry and then "OK".

4.  F-Spot displays the "Select Photos to Copy From Camera..." window and above that the "Downloading Previews" dialog with progress bar and message "Downloading Preview of IMG_5162.JPG".
5.  Next a dialog entitled "F-Spot Encountered a Fatal Error" with message "F-Spot Encountered a Fatal Error\n\nNumber overlow.\n\nError Details\n\n" with a "Close" button.  (Expect instead at this point to successfully download pictures and display thumbnails in the the "Select Photos to Copy From Camera...")
6.  Expand the "Error Details" section to show the following text:
An unhandled exception was thrown: Number overflow.

  at LibGPhoto2.CameraFile.GetDataAndSize () [0x00000] 
  at GPhotoCamera.GetPreviewPixbuf (.GPhotoCameraFile camfile) [0x00000] 
  at FSpot.CameraFileSelectionDialog.GetPreviews () [0x00000] 
  at FSpot.CameraFileSelectionDialog.CreateInterface () [0x00000] 
  at FSpot.CameraFileSelectionDialog.Run () [0x00000] 
  at MainWindow.ImportCamera (System.String camera_device) [0x00000] 
  at FSpot.Core+ImportCommand.Execute () [0x00000] 
  at FSpot.Core.Import (System.String path) [0x00000] 
  at FSpot.Driver.Main (System.String[] args) [0x00000] 
.NET Version: 2.0.50727.42

Assembly Version Information:

libgphoto2-sharp (1.0.3058.27752)
FlickrExport (0.0.0.0)
PicasaWebExport (0.0.0.0)
FolderExport (0.0.0.0)
CDExport (0.0.0.0)
SmugMugExport (0.0.0.0)
GalleryExport (0.0.0.0)
pango-sharp (2.12.0.0)
FSpot.Query (0.0.0.0)
SemWeb (0.7.1.0)
glade-sharp (2.12.0.0)
gtkhtml-sharp (3.16.0.0)
System.Transactions (2.0.0.0)
System.Data (2.0.0.0)
Mono.Data.SqliteClient (2.0.0.0)
System.Configuration (2.0.0.0)
System.Xml (2.0.0.0)
NDesk.DBus.Proxies (0.0.0.0)
gconf-sharp (2.20.0.0)
FSpot.Utils (0.0.0.0)
gdk-sharp (2.12.0.0)
gnome-vfs-sharp (2.20.0.0)
Mono.Addins (0.3.0.0)
NDesk.DBus.GLib (1.0.0.0)
NDesk.DBus (1.0.0.0)
System (2.0.0.0)
Mono.Posix (2.0.0.0)
Cms (0.0.0.0)
FSpot.Core (0.0.0.0)
atk-sharp (2.12.0.0)
gtk-sharp (2.12.0.0)
Mono.Addins.Setup (0.3.0.0)
gnome-sharp (2.20.0.0)
glib-sharp (2.12.0.0)
f-spot (0.4.3.1)
mscorlib (2.0.0.0)

Platform Information: Linux 2.6.24-23-powerpc ppc unknown GNU/Linux

Distribution Information:

[/etc/debian_version]
lenny/sid

[/etc/lsb-release]
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu 8.04.2"