Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.29.6-217.2.8.fc11.i686.PAE i686
Distribution: "Fedora release 11 (Leonidas)"

What I was doing when the application crashed:
Plasma crashed after uplugging remuvable USB device (SD card from usb reader). At the same time, two instances of Dolphin were opened. Plasma succeeded to restart in another process (visible from ksysguard), original was stopped and took 12.3M in memory and 22.6 on disk. After that, combination SIGUSR1+SIGUSR2+SIGCONT to it was successfull (SIGUSR1 probably not needed). 

Cheers, Jože

 -- Backtrace:
Application: Delovno okolje Plasma (plasma-desktop), signal: Segmentation fault
__kernel_vsyscall () at arch/x86/vdso/vdso32/int80.S:16
16		ret
[Current thread is 1 (Thread 0xb8056780 (LWP 3169))]

Thread 2 (Thread 0xacde0b70 (LWP 3170)):
#0  __kernel_vsyscall () at arch/x86/vdso/vdso32/int80.S:16
#1  0x007c7fa5 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S:122
#2  0x01d35ae7 in QWaitConditionPrivate::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:87
#3  QWaitCondition::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:159
#4  0x00481612 in QHostInfoAgent::run (this=0x8a623a0) at kernel/qhostinfo.cpp:260
#5  0x01d34ab2 in QThreadPrivate::start (arg=0x8a623a0) at thread/qthread_unix.cpp:188
#6  0x007c3935 in start_thread (arg=0xacde0b70) at pthread_create.c:297
#7  0x0606893e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb8056780 (LWP 3169)):
[KCrash Handler]
#6  0x031ea3fc in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0x031e7226 in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0x031e7a74 in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0x031e7b2c in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0x031f3c9e in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0x031f5457 in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0x01e3ac73 in QMetaObject::activate (sender=0x89d9340, from_signal_index=22, to_signal_index=22, argv=0xbfa87fe8) at kernel/qobject.cpp:3113
#13 0x01e3b8d2 in QMetaObject::activate (sender=0x89d9340, m=0x323d194, local_signal_index=1, argv=0xbfa87fe8) at kernel/qobject.cpp:3187
#14 0x03228713 in TaskManager::TaskGroup::itemRemoved(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#15 0x03228f3b in TaskManager::TaskGroup::remove(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#16 0x032104bd in ?? () from /usr/lib/libtaskmanager.so.4
#17 0x032122d3 in TaskManager::GroupManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#18 0x01e3ac73 in QMetaObject::activate (sender=0x8a1bdc8, from_signal_index=5, to_signal_index=5, argv=0xbfa881c8) at kernel/qobject.cpp:3113
#19 0x01e3b8d2 in QMetaObject::activate (sender=0x8a1bdc8, m=0x323d35c, local_signal_index=1, argv=0xbfa881c8) at kernel/qobject.cpp:3187
#20 0x0322c133 in TaskManager::TaskManager::taskRemoved(KSharedPtr<TaskManager::Task>) () from /usr/lib/libtaskmanager.so.4
#21 0x0322deb2 in TaskManager::TaskManager::windowRemoved(unsigned long) () from /usr/lib/libtaskmanager.so.4
#22 0x0322f807 in TaskManager::TaskManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#23 0x01e3ac73 in QMetaObject::activate (sender=0x875dc30, from_signal_index=6, to_signal_index=6, argv=0xbfa88348) at kernel/qobject.cpp:3113
#24 0x01e3b8d2 in QMetaObject::activate (sender=0x875dc30, m=0x135b92c, local_signal_index=2, argv=0xbfa88348) at kernel/qobject.cpp:3187
#25 0x012a8843 in KWindowSystem::windowRemoved (this=0x875dc30, _t1=79691853) at /usr/src/debug/kdelibs-4.3.0/i586-redhat-linux-gnu/kdeui/kwindowsystem.moc:127
#26 0x012abab6 in KWindowSystemPrivate::removeClient (this=0x874bbc0, w=79691853) at /usr/src/debug/kdelibs-4.3.0/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#27 0x012ba00f in NETRootInfo::update (this=0x874bbd4, dirty_props=0xbfa884d8) at /usr/src/debug/kdelibs-4.3.0/kdeui/windowmanagement/netwm.cpp:2183
#28 0x012bab77 in NETRootInfo::event (this=0x874bbd4, event=<value optimized out>, properties=0xbfa885c4, properties_size=5) at /usr/src/debug/kdelibs-4.3.0/kdeui/windowmanagement/netwm.cpp:2058
#29 0x012abd51 in KWindowSystemPrivate::x11Event (this=0x874bbc0, ev=0xbfa89bcc) at /usr/src/debug/kdelibs-4.3.0/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#30 0x01158516 in KAppX11HackWidget::publicx11Event (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:900
#31 KApplication::x11EventFilter (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:950
#32 0x002ea20a in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#33 0x014d45e0 in qt_x11EventFilter (ev=0xbfa89bcc) at kernel/qapplication_x11.cpp:375
#34 0x014e5900 in QApplication::x11ProcessEvent (this=0x85b0058, event=0xbfa89bcc) at kernel/qapplication_x11.cpp:3266
#35 0x01512302 in x11EventSourceDispatch (s=0x85c2da8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x04555cf8 in g_main_dispatch (context=<value optimized out>) at gmain.c:1824
#37 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2377
#38 0x04559370 in g_main_context_iterate (context=0x85c2290, block=<value optimized out>, dispatch=1, self=0x85b6e80) at gmain.c:2455
#39 0x045594a3 in IA__g_main_context_iteration (context=0x85c2290, may_block=1) at gmain.c:2518
#40 0x01e4f9dc in QEventDispatcherGlib::processEvents (this=0x859ae50, flags={i = 36}) at kernel/qeventdispatcher_glib.cpp:327
#41 0x015119e5 in QGuiEventDispatcherGlib::processEvents (this=0x859ae50, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#42 0x01e23539 in QEventLoop::processEvents (this=0xbfa89ec4, flags={i = 36}) at kernel/qeventloop.cpp:149
#43 0x01e2398a in QEventLoop::exec (this=0xbfa89ec4, flags={i = 0}) at kernel/qeventloop.cpp:201
#44 0x01e25dff in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#45 0x01472707 in QApplication::exec () at kernel/qapplication.cpp:3525
#46 0x002d42fd in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#47 0x080486fb in _start ()

Reported using DrKonqi