kile gives crash time after closed

[KT]

Binary package hint: kile

After ending kile it takes some time and then

Application: Kile (kile), signal: Segmentation fault
[KCrash Handler]
#5 0x00007fae56a07b00 in QStackedWidget::currentWidget() const () from /usr/lib/libQtGui.so.4
#6 0x00000000006cf2fd in _start ()

ProblemType: Bug
Architecture: amd64
Date: Sun Jan 3 21:36:37 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/kile
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: nvidia
Package: kile 1:2.1.0~svn1014763beta2-1ubuntu1
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
SourcePackage: kile
Uname: Linux 2.6.31-16-generic x86_64
XsessionErrors:
 (polkit-gnome-authentication-agent-1:1599): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (firefox:1657): GLib-WARNING **: g_set_prgname() called multiple times
 (firefox:1876): GLib-WARNING **: g_set_prgname() called multiple times