Application that crashed: dolphin
Version of the application: 1.2.80
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
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:
dolphin crashed while navigating through directories containing video files (avi, mp4,mpg). The crash is not reproducable.

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
[Current thread is 0 (LWP 27774)]

Thread 2 (Thread 0xaf9fdb90 (LWP 30933)):
#0  0xb8004430 in __kernel_vsyscall ()
#1  0xb60f6412 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb649b344 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb0865ae3 in ?? () from /usr/lib/libxine.so.1

Thread 1 (Thread 0xb5c6e700 (LWP 27774)):
[KCrash Handler]
#6  0xb7e87caf in KFileItem::determineMimeType () from /usr/lib/libkio.so.5
#7  0xb7e87e0f in KFileItem::mimetype () from /usr/lib/libkio.so.5
#8  0xb7d5ea55 in KFilePreviewGenerator::Private::createPreviews () from /usr/lib/libkfile.so.4
#9  0xb7d5ee07 in KFilePreviewGenerator::Private::updateIcons () from /usr/lib/libkfile.so.4
#10 0xb7d5efc8 in KFilePreviewGenerator::Private::delayedIconUpdate () from /usr/lib/libkfile.so.4
#11 0xb7d5ff0e in KFilePreviewGenerator::qt_metacall () from /usr/lib/libkfile.so.4
#12 0xb6790ca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#13 0xb6791932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb67cc717 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#15 0xb67966fe in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#16 0xb678b15f in QObject::event () from /usr/lib/libQtCore.so.4
#17 0xb69b2e9c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#18 0xb69bb19e in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0xb771ee8d in KApplication::notify () from /usr/lib/libkdeui.so.5
#20 0xb677aa3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#21 0xb67a9d71 in ?? () from /usr/lib/libQtCore.so.4
#22 0xb67a64e0 in ?? () from /usr/lib/libQtCore.so.4
#23 0xb5ef0b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb5ef40eb in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb5ef4268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb67a6438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0xb6a54365 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb677906a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0xb67794aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0xb677b959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0xb69b2d17 in QApplication::exec () from /usr/lib/libQtGui.so.4
#32 0x0807a8af in _start ()

Reported using DrKonqi