Do you, by chance, have basket installed?
Can you try to install the debug packages to get a better backtrace?

I do have basket installed.  I also installed kdepim-dbg.  Is that the debugging package you mentioned?

>I do have basket installed.  
Try deinstalling it.

>I also installed kdepim-dbg.  Is that the debugging package you mentioned? 
Yes. The debug packages of kdelibs and qt should also be installed.

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1241822416 (LWP 5849)]
[New Thread -1280353376 (LWP 5853)]
[New Thread -1271960672 (LWP 5852)]
[New Thread -1263567968 (LWP 5851)]
[New Thread -1255175264 (LWP 5850)]
[KCrash handler]
#6  0x53e58955 in ?? ()
#7  0xb703172e in QObject::connect (sender=0xb5a210cc, 
    signal=0xb7e165da "2destroyed()", receiver=0x827fb40, 
    member=0xb7e165c9 "1partDestroyed()") at kernel/qobject.cpp:1732
#8  0xb7e131df in Kontact::Plugin::part (this=0x827fb40)
    at /usr/share/qt3/include/qobject.h:228
#9  0x08061160 in Kontact::MainWindow::selectPlugin (this=0x810b260, 
    plugin=0x827fb40)
    at /build/buildd/kdepim-3.5.5/./kontact/src/mainwindow.cpp:536
#10 0x0805a4b2 in Kontact::MainWindow::loadSettings (this=0x810b260)
    at /build/buildd/kdepim-3.5.5/./kontact/src/mainwindow.cpp:636
#11 0x0805f9e2 in Kontact::MainWindow::initObject (this=0x810b260)
    at /build/buildd/kdepim-3.5.5/./kontact/src/mainwindow.cpp:160
#12 0x080606df in KontactApp::newInstance (this=0xbf880590)
    at /build/buildd/kdepim-3.5.5/./kontact/src/main.cpp:107
#13 0xb76e0adf in KUniqueApplication::processDelayed ()
   from /usr/lib/libkdecore.so.4
#14 0xb76e71b8 in KUniqueApplication::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#15 0xb702f957 in QObject::activate_signal (this=0x8101558, clist=0x8101650, 
    o=0xbf87ff38) at kernel/qobject.cpp:2356
#16 0xb73bbf44 in QSignal::signal (this=0x8101558, t0=@0x8101580)
    at .moc/debug-shared-mt/moc_qsignal.cpp:100
#17 0xb704f8ea in QSignal::activate (this=0x8101558) at kernel/qsignal.cpp:212
#18 0xb7057300 in QSingleShotTimer::event (this=0x8101530)
    at kernel/qtimer.cpp:286
#19 0xb6fc6b88 in QApplication::internalNotify (this=0xbf880590, 
    receiver=0x8101530, e=0xbf880288) at kernel/qapplication.cpp:2635
#20 0xb6fc89b7 in QApplication::notify (this=0xbf880590, receiver=0x8101530, 
    e=0xbf880288) at kernel/qapplication.cpp:2358
#21 0xb76efdb2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#22 0xb6f59389 in QApplication::sendEvent (receiver=0x8101530, 
    event=0xbf880288) at ../include/qapplication.h:520
#23 0xb6fb95d3 in QEventLoop::activateTimers (this=0x80f5360)
    at kernel/qeventloop_unix.cpp:556
#24 0xb6f6dec5 in QEventLoop::processEvents (this=0x80f5360, flags=4)
    at kernel/qeventloop_x11.cpp:389
#25 0xb6fe125e in QEventLoop::enterLoop (this=0x80f5360)
    at kernel/qeventloop.cpp:198
#26 0xb6fe106e in QEventLoop::exec (this=0x80f5360)
    at kernel/qeventloop.cpp:145
#27 0xb6fc8731 in QApplication::exec (this=0xbf880590)
    at kernel/qapplication.cpp:2758
#28 0x0805ad81 in main (argc=1, argv=)
    at /build/buildd/kdepim-3.5.5/./kontact/src/main.cpp:161
#29 0xb778d8cc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#30 0x08058311 in _start ()


Will I still be able to use basket later, if I uninstall it now.  I mean, does basket work with kontact?

Thanks,
Scott

> Will I still be able to use basket later, if I uninstall it now. 

Kontact did work when Basket was uninstalled.  It also works if Basket is already running when I try to run Kontact.  Thanks for you help

Closing since this is a Basket bug, not a Kontact bug.

Nice try Thomas :)

>Nice try Thomas :) 
Oops, I didn't know that basket has its own category in the bug system. Sorry.

*** This bug has been marked as a duplicate of 141299 ***