kdenlive crashing when playing the vidéo project

Binary package hint: kdenlive

I've add 2 movie avi and vob, and when playing the project, kdenlive crash..

Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
Description: Ubuntu 9.10
Release: 9.10
Package: kdenlive
Status: install ok installed
Priority: optional
Section: video
Installed-Size: 2772
Maintainer: Ubuntu MOTU Developers <email address hidden>
Architecture: amd64
Version: 0.7.5-1ubuntu1
Replaces: kdenlive-data (<< 0.7)
Depends: kdebase-runtime (>= 4:4.2.96), kdelibs5 (>= 4:4.2.96), libc6 (>= 2.4), libgcc1 (>= 1:4.1.1), libmlt++2, libmlt1, libqt4-dbus (>= 4.5.1), libqt4-network (>= 4.5.1), libqt4-svg (>= 4.5.1), libqt4-xml (>= 4.5.1), libqtcore4 (>= 4.5.1), libqtgui4 (>= 4.5.1), libstdc++6 (>= 4.1.1), kdenlive-data (= 0.7.5-1ubuntu1), melt, ffmpeg
Recommends: swh-plugins, dvgrab, frei0r-plugins, recordmydesktop, dvdauthor, genisoimage
Description: a non-linear video editor
 Kdenlive is a non-linear video editing suite, which supports DV, HDC and much
 more formats.
 It main features are:
  Guides and marker for organizing timelines
  Copy and paste support for clips, effects and transitions
  Real time changes
  Firewire and Video4Linux capture
  Screen grabbing
  Exporting to any by FFMPEG supported format
Homepage: http://www.kdenlive.org/
Original-Maintainer: Patrick Matthäi <email address hidden>
Package: kdenlive
Priority: optional
Section: universe/graphics
Installed-Size: 2772
Maintainer: Ubuntu MOTU Developers <email address hidden>
Original-Maintainer: Patrick Matthäi <email address hidden>
Architecture: amd64
Version: 0.7.5-1ubuntu1
Replaces: kdenlive-data (<< 0.7)
Depends: kdebase-runtime (>= 4:4.2.96), kdelibs5 (>= 4:4.2.96), libc6 (>= 2.4), libgcc1 (>= 1:4.1.1), libmlt++2, libmlt1, libqt4-dbus (>= 4.5.1), libqt4-network (>= 4.5.1), libqt4-svg (>= 4.5.1), libqt4-xml (>= 4.5.1), libqtcore4 (>= 4.5.1), libqtgui4 (>= 4.5.1), libstdc++6 (>= 4.1.1), kdenlive-data (= 0.7.5-1ubuntu1), melt, ffmpeg
Recommends: swh-plugins, dvgrab, frei0r-plugins, recordmydesktop, dvdauthor, genisoimage
Filename: pool/universe/k/kdenlive/kdenlive_0.7.5-1ubuntu1_amd64.deb
Size: 1030472
MD5sum: d067f7c88f6c46fdf711205c8f447ab6
SHA1: 1bf2f6931629146be863737f2dd547dd7669dd52
SHA256: cd4ed221a9a2fec711a48be44bd37b2fabe0cbf79c36a36791727bb28f8f4419
Description: a non-linear video editor
 Kdenlive is a non-linear video editing suite, which supports DV, HDC and much
 more formats.
 It main features are:
  Guides and marker for organizing timelines
  Copy and paste support for clips, effects and transitions
  Real time changes
  Firewire and Video4Linux capture
  Screen grabbing
  Exporting to any by FFMPEG supported format
Homepage: http://www.kdenlive.org/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

kdenlive:
  Installé : 0.7.5-1ubuntu1
  Candidat : 0.7.5-1ubuntu1
 Table de version :
 *** 0.7.5-1ubuntu1 0
        500 http://ch.archive.ubuntu.com karmic/universe Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
Architecture: amd64
Date: Tue Feb 2 02:03:06 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: kdenlive 0.7.5-1ubuntu1
ProcEnviron:
 LANGUAGE=fr_CH:fr
 LANG=fr_CH.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-17.54-generic
SourcePackage: kdenlive
Uname: Linux 2.6.31-17-generic x86_64