Thanks for the bug report. Without a stack trace from the crash it's
very hard to determine what caused the crash. Please see
http://bugzilla.gnome.org/getting-traces.cgi for more information
about getting a useful stack trace.

Also, which version of Nautilus are you using?

i get the same error... always when gnome starts. if i close the error
message it appears again.

a nautilus --check says:

----begin----

(nautilus:6209): GnomeUI-WARNING **: While connecting to session manager:
Authentication Rejected, reason : None of the authentication protocols
specified are supported and host-based authentication failed.
running nautilus_self_check_search_uri
 
FAIL: check failed in nautilus-search-uri.c, line 702
      evaluated: nautilus_search_uri_to_human ("search:[][]file_type
is file")
       expected: Objekte, die reguläre Dateien sind
            got: Objekte die »reguläre Dateien« sind
FAIL: check failed in nautilus-search-uri.c, line 705
      evaluated: nautilus_search_uri_to_human ("search:[][]file_name
contains stuff & file_type is file")
       expected: Objekte mit »stuff« in ihren Namen, die reguläre
Dateien sind
            got: Objekte mit »stuff« in ihren Namen und die
»reguläre Dateien« sind
FAIL: check failed in nautilus-search-uri.c, line 710
      evaluated: nautilus_search_uri_to_human ("search:[][]file_name
contains stuff & file_type is file" " & size smaller_than 2000")
       expected: Objekte mit »stuff« in ihren Namen, die reguläre
Dateien kleiner als 2000 Byte sind
            got: Objekte mit »stuff« in ihren Namen, die »reguläre
Dateien« sind und kleiner als 2000 Byte
FAIL: check failed in nautilus-search-uri.c, line 714
      evaluated: nautilus_search_uri_to_human ("search:[][]file_name
contains medusa & file_type is directory")
       expected: Objekte mit »medusa« in ihren Namen, die Ordner sind
            got: Objekte mit »medusa« in ihren Namen und die
»Ordner« sind
running nautilus_self_check_file_utilities
running nautilus_self_check_file_operations
FAIL: check failed in nautilus-file-operations.c, line 2355
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(13th copy)", __LC_MESSAGES), 1)
       expected: foo (14. Kopie)
            got: foo (14. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2357
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(21st copy)", __LC_MESSAGES), 1)
       expected: foo (22. Kopie)
            got: foo (22. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2359
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(22nd copy)", __LC_MESSAGES), 1)
       expected: foo (23. Kopie).txt
            got: foo (23. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2361
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(23rd copy)", __LC_MESSAGES), 1)
       expected: foo (24. Kopie)
            got: foo (24. Kopie).txt
FAIL: check failed in nautilus-file-operations.c, line 2363
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(24th copy)", __LC_MESSAGES), 1)
       expected: foo (25. Kopie)
            got: foo (25. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2365
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo foo
(24th copy)", __LC_MESSAGES), 1)
       expected: foo foo (25. Kopie)
            got: foo foo (25. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2368
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(10th copy)", __LC_MESSAGES), 1)
       expected: foo (11. Kopie)
            got: foo (11. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2370
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(11th copy)", __LC_MESSAGES), 1)
       expected: foo (12. Kopie)
            got: foo (12. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2372
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(12th copy)", __LC_MESSAGES), 1)
       expected: foo (13. Kopie)
            got: foo (13. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2374
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(110th copy)", __LC_MESSAGES), 1)
       expected: foo (111. Kopie)
            got: foo (111. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2375
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(110th copy).txt", __LC_MESSAGES), 1)
       expected: foo (111. Kopie).txt
            got: foo (112. Kopie).txt
FAIL: check failed in nautilus-file-operations.c, line 2376
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(122nd copy)", __LC_MESSAGES), 1)
       expected: foo (123. Kopie)
            got: foo (123. Kopie). Kopie)
FAIL: check failed in nautilus-file-operations.c, line 2378
      evaluated: get_duplicate_name (dcgettext (((void *)0), "foo
(123rd copy)", __LC_MESSAGES), 1)
       expected: foo (124. Kopie)
            got: foo (124. Kopie). Kopie)
running nautilus_self_check_directory

----end (again with a crash window)----


i just updated a few packages with newer ones from the cooker
distribution. is this the problem?

any news on the crasher ? do you still get it ?

*** This bug has been marked as a duplicate of 45406 ***