Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.85 (KDE 4.2.85 (KDE 4.3 Beta1))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-11-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
plasma often crash when i start Firefox, even when no flash

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 0 (LWP 3881)]

Thread 2 (Thread 0xa8067b90 (LWP 3999)):
#0  0xb7f8b430 in __kernel_vsyscall ()
#1  0xb505a0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb62aa2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb648e5b2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb78ecae2 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb648d56e in ?? () from /usr/lib/libQtCore.so.4
#6  0xb50564ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb629b49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb3c85730 (LWP 3881)):
[KCrash Handler]
#6  0xa8713137 in TaskManager::Task::window () from /usr/lib/libtaskmanager.so.4
#7  0xb6591f0f in QObject::event () from /usr/lib/libQtCore.so.4
#8  0xb6e95257 in QGraphicsWidget::event () from /usr/lib/libQtGui.so.4
#9  0xb680cbcc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#10 0xb6814ede in QApplication::notify () from /usr/lib/libQtGui.so.4
#11 0xb766ec9d in KApplication::notify () from /usr/lib/libkdeui.so.5
#12 0xb65817ab in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#13 0xb65b0b31 in ?? () from /usr/lib/libQtCore.so.4
#14 0xb65ad280 in ?? () from /usr/lib/libQtCore.so.4
#15 0xb4e54b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#16 0xb4e580eb in ?? () from /usr/lib/libglib-2.0.so.0
#17 0xb4e58268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#18 0xb65ad1d8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb68ae765 in ?? () from /usr/lib/libQtGui.so.4
#20 0xb657fdda in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#21 0xb658021a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#22 0xb65826c9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#23 0xb680ca47 in QApplication::exec () from /usr/lib/libQtGui.so.4
#24 0xb7f2b290 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#25 0x08048712 in _start ()