Bug 196494

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 2.6.28-12-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I test KDE4.2.2 and .4 and so, but Dolphin crash every time without sense...
I open dolphin, work with it and when I close this, he crash in 70% of cases.

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
[KCrash Handler]
#6  0xb7deccaf in KFileItem::determineMimeType () from /usr/lib/libkio.so.5
#7  0xb7dece0f in KFileItem::mimetype () from /usr/lib/libkio.so.5
#8  0xb7cc3a55 in KFilePreviewGenerator::Private::createPreviews () from /usr/lib/libkfile.so.4
#9  0xb7cc3e07 in KFilePreviewGenerator::Private::updateIcons () from /usr/lib/libkfile.so.4
#10 0xb7cc3fc8 in KFilePreviewGenerator::Private::delayedIconUpdate () from /usr/lib/libkfile.so.4
#11 0xb7cc4f0e in KFilePreviewGenerator::qt_metacall () from /usr/lib/libkfile.so.4
#12 0xb66f5ca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#13 0xb66f6932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb6731717 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#15 0xb66fb6fe in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#16 0xb66f015f in QObject::event () from /usr/lib/libQtCore.so.4
#17 0xb6917e9c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#18 0xb692019e in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0xb7683e8d in KApplication::notify () from /usr/lib/libkdeui.so.5
#20 0xb66dfa3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#21 0xb670ed71 in ?? () from /usr/lib/libQtCore.so.4
#22 0xb670b4e0 in ?? () from /usr/lib/libQtCore.so.4
#23 0xb5e55b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb5e590eb in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb5e59268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb670b438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0xb69b9365 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb66de06a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0xb66de4aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0xb66e0959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0xb6917d17 in QApplication::exec () from /usr/lib/libQtGui.so.4
#32 0x0807a8af in _start ()

Reported using DrKonqi