Jaunty: Kdenlive crashing after a while - adding clips to project etc

Binary package hint: kdenlive

I am running kdenlive 0.7.2.1-ubuntu1 (jaunty). After a while, working with clips, adding new ones, creating a title or also saving the project file causes a crash. Here is the konsole output, and below is the backtrace.

7fd7a988d000-7fd7a9891000 r-xp 00000000 08:01 20045853 /usr/lib/kde4/plugins/imageformats/kimg_xview.so
7fd7a9891000-7fd7a9a90000 ---p 00004000KCrash: Application 'kdenlive' crashing...
sock_file=/home/nl/.kde/socket-server/kdeinit4__0

This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

[Thread debugging using libthread_db enabled]
[New Thread 0x7fd7c598c750 (LWP 2312)]
[New Thread 0x7fd7a6265950 (LWP 2333)]
[New Thread 0x7fd7a5a64950 (LWP 2332)]
0x00007fd7c183fd21 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 2312)]

Thread 3 (Thread 0x7fd7a5a64950 (LWP 2332)):
#0 0x00007fd7c138356d in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1 0x00007fd7c559cd93 in mlt_consumer_get_frame () from /usr/lib/libmlt.so.1
#2 0x00007fd7c559d005 in mlt_consumer_rt_frame () from /usr/lib/libmlt.so.1
#3 0x00007fd7b0fda1c1 in ?? () from /usr/lib/mlt/libmltsdl.so
#4 0x00007fd7c137f3ba in start_thread () from /lib/libpthread.so.0
#5 0x00007fd7c187dfcd in clone () from /lib/libc.so.6
#6 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fd7a6265950 (LWP 2333)):
#0 0x00007fd7c13832e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1 0x00007fd7b0fd8eab in ?? () from /usr/lib/mlt/libmltsdl.so
#2 0x00007fd7c137f3ba in start_thread () from /lib/libpthread.so.0
#3 0x00007fd7c187dfcd in clone () from /lib/libc.so.6
#4 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fd7c598c750 (LWP 2312)):
#0 0x00007fd7c183fd21 in nanosleep () from /lib/libc.so.6
#1 0x00007fd7c183fb47 in sleep () from /lib/libc.so.6
#2 0x00007fd7c4d6ecdf in ?? () from /usr/lib/libkdeui.so.5
#3 0x00007fd7c4d6f5ea in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5
#4 <signal handler called>
#5 0x00007fd7c17cafb5 in raise () from /lib/libc.so.6
#6 0x00007fd7c17ccbc3 in abort () from /lib/libc.so.6
#7 0x00007fd7c180a228 in ?? () from /lib/libc.so.6
#8 0x00007fd7c180fcb8 in ?? () from /lib/libc.so.6
#9 0x00007fd7c1813333 in ?? () from /lib/libc.so.6
#10 0x00007fd7c1814828 in malloc () from /lib/libc.so.6
#11 0x00007fd7c3a36da4 in ?? () from /usr/lib/libQtXml.so.4
#12 0x00007fd7c3a2aae4 in ?? () from /usr/lib/libQtXml.so.4
#13 0x00007fd7c3a2ace2 in ?? () from /usr/lib/libQtXml.so.4
#14 0x00007fd7c3a2d5e3 in ?? () from /usr/lib/libQtXml.so.4
#15 0x00007fd7c3a2d69c in ?? () from /usr/lib/libQtXml.so.4
#16 0x00007fd7c3a2f97c in QDomDocument::importNode () from /usr/lib/libQtXml.so.4
#17 0x000000000050c81f in KdenliveDoc::saveSceneList ()
#18 0x000000000051b019 in KdenliveDoc::slotAutoSave ()
#19 0x000000000051b31a in KdenliveDoc::qt_metacall ()
#20 0x00007fd7c3059132 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#21 0x00007fd7c3053413 in QObject::event () from /usr/lib/libQtCore.so.4
#22 0x00007fd7c24898dd in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#23 0x00007fd7c2491ada in QApplication::notify () from /usr/lib/libQtGui.so.4
#24 0x00007fd7c4d095fb in KApplication::notify () from /usr/lib/libkdeui.so.5
#25 0x00007fd7c304369c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#26 0x00007fd7c3070726 in ?? () from /usr/lib/libQtCore.so.4
#27 0x00007fd7c306ce3d in ?? () from /usr/lib/libQtCore.so.4
#28 0x00007fd7bd85919a in IA__g_main_context_dispatch (context=0x11ed5f0) at /build/buildd/glib2.0-2.19.8/glib/gmain.c:1814
#29 0x00007fd7bd85c870 in g_main_context_iterate (context=0x11ed5f0, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.19.8/glib/gmain.c:2448
#30 0x00007fd7bd85ca0c in IA__g_main_context_iteration (context=0x11ed5f0, may_block=1) at /build/buildd/glib2.0-2.19.8/glib/gmain.c:2511
#31 0x00007fd7c306cd9f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#32 0x00007fd7c2521d1f in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007fd7c3041f42 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#34 0x00007fd7c304230d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#35 0x00007fd7c30445d4 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#36 0x0000000000491d14 in main ()
#0 0x00007fd7c183fd21 in nanosleep () from /lib/libc.so.6