Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Since the last update Plasma crashes at least once per session. Once it crashes I get the bug report window, but it restarts by itself and I can continue using KDE for the rest of the day (yes, a whole day using it) without any further problems.

Looks like something related to startup or some of the apps that I usually open as soon as I log in, I've not had time to do any further testing.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4650)]

Thread 2 (Thread 0xa7c6ab90 (LWP 4655)):
#0  0xb7fc7430 in __kernel_vsyscall ()
#1  0xb64930e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66732ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7dc59b2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb7702152 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb7dc496e in ?? () from /usr/lib/libQtCore.so.4
#6  0xb648f4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb666449e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5f9c700 (LWP 4650)):
[KCrash Handler]
#6  0x09f76a3d in ?? ()
#7  0xb5cfe9ba in Plasma::Animator::timerEvent () from /usr/lib/libplasma.so.3
#8  0xb7ec915f in QObject::event () from /usr/lib/libQtCore.so.4
#9  0xb6949e9c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#10 0xb695219e in QApplication::notify () from /usr/lib/libQtGui.so.4
#11 0xb74833dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#12 0xb7eb8a3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#13 0xb7ee7d71 in ?? () from /usr/lib/libQtCore.so.4
#14 0xb7ee44e0 in ?? () from /usr/lib/libQtCore.so.4
#15 0xb64dbb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#16 0xb64df0eb in ?? () from /usr/lib/libglib-2.0.so.0
#17 0xb64df268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#18 0xb7ee4438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb69eb365 in ?? () from /usr/lib/libQtGui.so.4
#20 0xb7eb706a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#21 0xb7eb74aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#22 0xb7eb9959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#23 0xb6949d17 in QApplication::exec () from /usr/lib/libQtGui.so.4
#24 0xb3d20510 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#25 0x0804e1c0 in _start ()

Reported using DrKonqi