Nautilus crashes very often

After updating to Ubuntu 11.10, nautilus crashes every few seconds, most of the time when opening a folder.
Running nautilus from terminal spams the terminal with

(nautilus:8684): GConf-CRITICAL **: gconf_client_get: assertion `GCONF_IS_CLIENT (client)' failed,
(nautilus:8684): GLib-GObject-CRITICAL **: g_value_get_object: assertion `G_VALUE_HOLDS_OBJECT (value)' failed and
(nautilus:8684): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed.

When nautilus crashes, it shows "Speicherzugriffsfehler" (segmentation fault).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: nautilus 1:3.2.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Thu Oct 13 22:10:22 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to oneiric on 2011-10-13 (0 days ago)