Thanks for taking the time to report this bug.
Unfortunately, that stack trace is missing some elements that will help a lot to solve the problem, so it will be hard for the developers to fix that crash. Can you get us a stack trace with debugging symbols? Please see http://live.gnome.org/GettingTraces for more information on how to do so and reopen this bug or report a new one. Thanks in advance!

here is the data from the crash after Iinstalling the totem-dbg package
I hope this helps
Distribution: Debian lenny/sid
Gnome Release: 2.20.3 2008-01-12 (Debian)
BugBuddy Version: 2.20.1

System: Linux 2.6.22-3-k7 #1 SMP Sun Feb 10 21:04:14 UTC 2008 i686
X Vendor: The X.Org Foundation
X Vendor Release: 10300000
Selinux: No
Accessibility: Disabled
GTK+ Theme: Clearlooks
Icon Theme: gnome

Memory status: size: 37277696 vsize: 37277696 resident: 22720512 share: 11264000 rss: 22720512 rss_rlim: 4294967295
CPU usage: start_time: 1204149603 rtime: 41 utime: 39 stime: 2 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 100

Backtrace was generated from '/usr/bin/totem'

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb6e546b0 (LWP 3259)]
0xb74012fe in __waitpid_nocancel () from /lib/libpthread.so.0

+ Trace 190659

----------- .xsession-errors (503 sec old) ---------------------
(gnome-panel:2757): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
Window manager warning: Property _NET_WM_ICON_NAME on window 0x1c00adf contained invalid UTF-8
Window manager warning: Window 0x1c01750 () sets an MWM hint indicating it isn't resizable, but sets min size 1 x 1 and max size 2147483647 x 2147483647; this doesn't make much sense.
(gnome-panel:2757): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
Window manager warning: Property _NET_WM_NAME on window 0x1c01750 contained invalid UTF-8
(gnome-panel:2757): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
Window manager warning: Property _NET_WM_ICON_NAME on window 0x1c01750 contained invalid UTF-8
 *** Gnome Registry Session: yes.
 *** Gnome Registry Session: yes.
 *** Gnome Registry Session: yes.
--------------------------------------------------

If you're using totem-gstreamer could you install the gstreamer debug packages and reproduce the stack trace please? If you're using totem-xine, could you instead install the xine debug packages? Thanks.

here is the info I got after installing the gstreamer dubug packages.
I hope this helps.


Distribution: Debian lenny/sid
Gnome Release: 2.20.3 2008-01-12 (Debian)
BugBuddy Version: 2.20.1

System: Linux 2.6.22-3-k7 #1 SMP Sun Feb 10 21:04:14 UTC 2008 i686
X Vendor: The X.Org Foundation
X Vendor Release: 10300000
Selinux: No
Accessibility: Disabled
GTK+ Theme: Clearlooks
Icon Theme: gnome

Memory status: size: 37277696 vsize: 37277696 resident: 22687744 share: 11231232 rss: 22687744 rss_rlim: 4294967295
CPU usage: start_time: 1204236564 rtime: 42 utime: 40 stime: 2 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 100

Backtrace was generated from '/usr/bin/totem'

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb6dff6b0 (LWP 4832)]
0xb73ac2fe in __waitpid_nocancel () from /lib/libpthread.so.0

+ Trace 190775

----------- .xsession-errors (31 sec old) ---------------------
Warning:          No symbols defined for <I73> (keycode 243)
Warning:          No symbols defined for <I74> (keycode 244)
Warning:          No symbols defined for <I75> (keycode 245)
Warning:          No symbols defined for <I76> (keycode 246)
Warning:          No symbols defined for <I77> (keycode 247)
Warning:          No symbols defined for <I78> (keycode 248)
Warning:          No symbols defined for <I79> (keycode 249)
Warning:          No symbols defined for <I7A> (keycode 250)
Warning:          No symbols defined for <I7B> (keycode 251)
Warning:          No symbols defined for <I7C> (keycode 252)
Warning:          No symbols defined for <I7D> (keycode 253)
Warning:          No symbols defined for <I7E> (keycode 254)
Warning:          No symbols defined for <I7F> (keycode 255)
[1204236460,000,xklavier.c:xkl_engine_start_listen/] 	The backend does not require manual layout management - but it is provided by the applicationCould not initialize GStreamer: Error re-scanning reg
 *** Gnome Registry Session: yes.
--------------------------------------------------

> Could not initialize GStreamer: Error re-scanning reg
>  *** Gnome Registry Session: yes.

Looks like a corrupted GStreamer registry. Let's see what the GStreamer people say.

"Error re-scanning registry: ..." usually happens when it can't load one of the plugins for some reason. It should give you the reason there, but it looks like that part of the output is missing.

Still, the debug traces are not useful at all I'm afraid.

If you can still reproduce this, maybe you could run it like this from a terminal:

 $ GST_DEBUG=*:5 totem 2>dbg.log
  ... wait for the crash ...
 $ gzip dbg.log

and attach the dbg.log file?

Closing this bug report as no further information has been provided. Please feel free to reopen this bug if you can provide the information asked for.
Thanks!