gvfsd-sftp crashed with SIGABRT in g_assertion_message()

would connect to a host, than the connection could not be complete established because of connectivity. Gnome shows me the "mountet" sftp connect, but cound not show me the content.

after fixing the connection problem i "unmounted" the connection and reestablished to sftp and got this crash.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: gvfs-backends 1.17.90-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
Uname: Linux 3.11.0-4-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Wed Sep 4 07:53:03 2013
ExecutablePath: /usr/lib/gvfs/gvfsd-sftp
InstallationDate: Installed on 2013-08-19 (15 days ago)
InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Alpha amd64 (20130724)
MarkForUpload: True
ProcCmdline: /usr/lib/gvfs/gvfsd-sftp --spawner :1.12 /org/gtk/gvfs/exec_spaw/4
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, user)
 LANG=de_DE.UTF-8
Signal: 6
SourcePackage: gvfs
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/gvfs/libgvfsdaemon.so
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gvfsd-sftp crashed with SIGABRT in g_assertion_message()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo