Application that crashed: kontact
Version of the application: 4.3.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-15-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
hello, I need to know what packages to install to help you better bug reports, thanks

kde4 use with almost everything, marble, kopete, kontact, dolphin, dragon, Akonadi, akregator, amarok, k3b .... and etc. I expect an answer thanks again

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007fd4cba4e780 in QListData::shared_null () from /usr/lib/libQtCore.so.4
#6  0x00007fd4c9c7ff1b in qDeleteAll<QList<KIO::Slave*>::const_iterator> (begin=<value optimized out>, end=...) at /usr/include/qt4/QtCore/qalgorithms.h:350
#7  qDeleteAll<SlaveList> (begin=<value optimized out>, end=...) at /usr/include/qt4/QtCore/qalgorithms.h:358
#8  ~ProtocolInfo (begin=<value optimized out>, end=...) at ../../kio/kio/scheduler.cpp:171
#9  qDeleteAll<QHash<QString, KIO::SchedulerPrivate::ProtocolInfo*>::const_iterator> (begin=<value optimized out>, end=...) at /usr/include/qt4/QtCore/qalgorithms.h:350
#10 0x00007fd4c9c7c523 in qDeleteAll<KIO::SchedulerPrivate::ProtocolInfoDict> () at /usr/include/qt4/QtCore/qalgorithms.h:358
#11 ~SchedulerPrivate () at ../../kio/kio/scheduler.cpp:103
#12 destroy () at ../../kio/kio/scheduler.cpp:209
#13 0x00007fd4cafd2c12 in __run_exit_handlers (status=0) at exit.c:78
#14 *__GI_exit (status=0) at exit.c:100
#15 0x00007fd4cafb8ac4 in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fffb243f638) at libc-start.c:252
#16 0x0000000000403009 in _start ()

Reported using DrKonqi