pcmanfm crash unmounting ntfs partitions...

Description: Ubuntu 11.10
Release: 11.10

pcmanfm:
  Installato: 0.9.9-0ubuntu1
  Candidato: 0.9.9-0ubuntu1
  Tabella versione:
 *** 0.9.9-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages
        100 /var/lib/dpkg/status

I'm trying pcmanfm i run it via terminal command: pcmanfm.
I can mount and browse other partitions that i have on my pc (i mean ntfs partitions) when i umount them using icon o rigth clicking on partition item and selecting to umount pcmanfm hide itself.

in terminal i see:

** (pcmanfm:20977): DEBUG: vol-changed
** (pcmanfm:20977): DEBUG: mount path: 2865-16F5
** (pcmanfm:20977): DEBUG: on_mount_action_finished
** (pcmanfm:20977): DEBUG: vol-changed
** (pcmanfm:20977): DEBUG: on_mount_action_finished
** (pcmanfm:20977): DEBUG: event of the folder itself: 6
** (pcmanfm:20977): DEBUG: folder is unmounted
** (pcmanfm:20977): DEBUG: event of the folder itself: 6
** (pcmanfm:20977): DEBUG: folder is unmounted

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: pcmanfm 0.9.9-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Config_pcmanfm_System_gnome-fallback: Error: [Errno 2] File o directory non esistente: '/etc/xdg/pcmanfm/gnome-fallback/pcmanfm.conf'
Date: Tue Oct 18 16:59:35 2011
Pref_Config_System_gnome-fallback:
 [Preferred Applications]
 WebBrowser=firefox.desktop
 MailClient=
SourcePackage: pcmanfm
UpgradeStatus: Upgraded to oneiric on 2011-06-07 (132 days ago)