Bug#517245: cheese: i can't see any image, but saving images and videos works

[luigi]

Package: cheese
Version: 2.22.3-3
Severity: important

i use kde and an acer crystal eye webcam (it uses uvcvideo module to work); 
it is the integrated webcam in my notebook, an acer aspire 5520g. 
if i start cheese i can't see any image from camera, but light, that indicates that the webcam works, turns on; 
saving images or videos works.
kopete works with this camera. 

the output from console is:

salvatore at coccionepc:~$ cheese -v
Detected webcam: Acer CrystalEye webcam
device: /dev/video0
video/x-raw-yuv 160 x 120 num_framerates 6
30/1 20/1 15/1 10/1 5/1 1/1
video/x-raw-yuv 176 x 144 num_framerates 6
30/1 20/1 15/1 10/1 5/1 1/1
video/x-raw-yuv 320 x 240 num_framerates 6
30/1 20/1 15/1 10/1 5/1 1/1
video/x-raw-yuv 352 x 288 num_framerates 6
30/1 20/1 15/1 10/1 5/1 1/1
video/x-raw-yuv 640 x 480 num_framerates 6
30/1 20/1 15/1 10/1 5/1 1/1
v4l2src name=video_source device=/dev/video0 ! video/x-raw-yuv,width=640,height=480,framerate=30/1 ! identity

** (cheese:20739): CRITICAL **: gst_x_overlay_set_xwindow_id: assertion `overlay != NULL' failed

** (cheese:20739): CRITICAL **: gst_x_overlay_set_xwindow_id: assertion `overlay != NULL' failed

-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (990, 'testing'), (800, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages cheese depends on:
ii  gconf2                     2.22.0-1      GNOME configuration database syste
ii  gstreamer0.10-plugins-base 0.10.19-2     GStreamer plugins from the "base" 
ii  gstreamer0.10-plugins-good 0.10.8-4.1    GStreamer plugins from the "good" 
ii  libart-2.0-2               2.3.20-2      Library of functions for 2D graphi
ii  libatk1.0-0                1.22.0-1      The ATK accessibility toolkit
ii  libbonobo2-0               2.22.0-1      Bonobo CORBA interfaces library
ii  libbonoboui2-0             2.22.0-1      The Bonobo UI library
ii  libc6                      2.7-18        GNU C Library: Shared libraries
ii  libcairo2                  1.6.4-7       The Cairo 2D vector graphics libra
ii  libdbus-1-3                1.2.1-5       simple interprocess messaging syst
ii  libdbus-glib-1-2           0.76-1        simple interprocess messaging syst
ii  libebook1.2-9              2.22.3-1.1    Client library for evolution addre
ii  libedataserver1.2-9        2.22.3-1.1    Utility library for evolution data
ii  libgconf2-4                2.22.0-1      GNOME configuration database syste
ii  libglib2.0-0               2.16.6-1      The GLib library of C routines
ii  libgnome2-0                2.20.1.1-2    The GNOME 2 library - runtime file
ii  libgnomecanvas2-0          2.20.1.1-1    A powerful object-oriented display
ii  libgnomeui-0               2.20.1.1-2    The GNOME 2 libraries (User Interf
ii  libgnomevfs2-0             1:2.22.0-5    GNOME Virtual File System (runtime
ii  libgstreamer-plugins-base0 0.10.19-2     GStreamer libraries from the "base
ii  libgstreamer0.10-0         0.10.19-3     Core GStreamer libraries and eleme
ii  libgtk2.0-0                2.12.11-4     The GTK+ graphical user interface 
ii  libhal1                    0.5.11-8      Hardware Abstraction Layer - share
ii  libice6                    2:1.0.4-1     X11 Inter-Client Exchange library
ii  liborbit2                  1:2.14.16-0.1 libraries for ORBit2 - a CORBA ORB
ii  libpango1.0-0              1.20.5-3      Layout and rendering of internatio
ii  libpopt0                   1.14-4        lib for parsing cmdline parameters
ii  librsvg2-2                 2.22.2-4      SAX-based renderer library for SVG
ii  libsm6                     2:1.1.0-2     X11 Session Management library
ii  libxml2                    2.6.32.dfsg-5 GNOME XML library
ii  libxxf86vm1                1:1.0.2-1     X11 XFree86 video mode extension l

cheese recommends no packages.

cheese suggests no packages.

-- no debconf information