Same problem.
Ubuntu 9.10
Theme: Human-Clearlooks

** Running f-spot in Debug Mode **
** Running Mono with --debug   **
[Info  20:03:09.432] Initializing DBus
[Debug 20:03:09.694] DBusInitialization took 0,240622s
[Info  20:03:09.695] Initializing Mono.Addins
[Debug 20:03:10.051] Mono.Addins Initialization took 0,356382s
[Info  20:03:10.080] Starting new FSpot server (f-spot 0.6.1.5)
[Debug 20:03:10.467] Db Initialization took 0,106226s

** (f-spot:6713): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed

** (f-spot:6713): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed

** (f-spot:6713): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed

** (f-spot:6713): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed

** (f-spot:6713): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed
[Debug 20:03:11.022] Query Started : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.025] QueryToTemp took 0,003101s : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.026] Reloading the query took 0,007683s
[Debug 20:03:11.330] PhotosPerMonth took 0,04462s
[Debug 20:03:11.339] TimeAdaptor REAL Reload took 0,270878s
[Debug 20:03:11.481] Query Started : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.482] QueryToTemp took 0,001186s : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.541] Reloading the query took 0,061244s
[Debug 20:03:11.548] Query Started : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.553] QueryToTemp took 0,005055s : SELECT * FROM photos  WHERE  photos.id NOT IN (SELECT photo_id FROM photo_tags WHERE tag_id = 2) ORDER BY  time DESC, filename DESC 
[Debug 20:03:11.569] Reloading the query took 0,021789s
[Info  20:03:11.579] Starting BeagleService
[Debug 20:03:11.582] BeagleService startup took 4,1E-05s
[Info  20:03:11.629] Hack for gnome-settings-daemon engaged

(f-spot:6713): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without calling gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the data stream to the loader before dropping the last reference.
[Debug 20:03:11.704] PhotosPerMonth took 0,009822s
[Debug 20:03:11.704] TimeAdaptor REAL Reload took 0,150725s
[Debug 20:03:11.785] PhotosPerMonth took 0,022472s
[Debug 20:03:11.786] TimeAdaptor REAL Reload took 0,231854s
The program 'f-spot' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
  (Details: serial 2662 error_code 1 request_code 135 minor_code 19)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)