Version:            (using KDE KDE 3.5.5)
Installed from:    Gentoo Packages
Compiler:          gcc-4.1.2, glibc-2.5-r3, 2.6.20-gentoo-r8 i686 
OS:                Linux

KDE Crash report:

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Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1208400208 (LWP 29722)]
[KCrash handler]
#6  0x00000171 in ?? ()
#7  0x081962fd in UMLListViewItem::deleteChildItem ()
#8  0x0819c72c in UMLListView::childObjectRemoved ()
#9  0x08209b9e in UMLListView::qt_invoke ()
#10 0x49e487c0 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#11 0x0811137a in UMLClassifier::operationRemoved ()
#12 0x08130cdd in UMLClassifier::removeOperation ()
#13 0x081310c4 in UMLClassifier::takeItem ()
#14 0x081e0aa2 in UMLListView::moveObject ()
#15 0x081e58bd in UMLListView::slotDropped ()
#16 0x08209cea in UMLListView::qt_invoke ()
#17 0x49e487c0 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#18 0x4a942433 in KListView::dropped () from /usr/kde/3.5/lib/libkdeui.so.4
#19 0x4a9428c2 in KListView::contentsDropEvent ()
   from /usr/kde/3.5/lib/libkdeui.so.4
#20 0x49f4d4d7 in QScrollView::viewportDropEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#21 0x49f4e6b5 in QScrollView::eventFilter () from /usr/qt/3/lib/libqt-mt.so.3
#22 0x49f1f66b in QListView::eventFilter () from /usr/qt/3/lib/libqt-mt.so.3
#23 0x081cab58 in UMLListView::eventFilter ()
#24 0x49e480fe in QObject::activate_filters ()
   from /usr/qt/3/lib/libqt-mt.so.3
#25 0x49e48159 in QObject::event () from /usr/qt/3/lib/libqt-mt.so.3
#26 0x49e7e2c4 in QWidget::event () from /usr/qt/3/lib/libqt-mt.so.3
#27 0x49dedcec in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#28 0x49dee807 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#29 0x4a484a6b in KApplication::notify ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#30 0x49d9ce0c in qt_handle_xdnd_drop () from /usr/qt/3/lib/libqt-mt.so.3
#31 0x49d9cfe7 in QDragManager::drop () from /usr/qt/3/lib/libqt-mt.so.3
#32 0x49d9ee67 in QDragManager::eventFilter ()
   from /usr/qt/3/lib/libqt-mt.so.3
#33 0x49dedcb0 in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#34 0x49dee9d7 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#35 0x4a484a6b in KApplication::notify ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#36 0x49d91e49 in QETWidget::translateMouseEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#37 0x49d91741 in QApplication::x11ProcessEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#38 0x49da0b1f in QEventLoop::processEvents ()
   from /usr/qt/3/lib/libqt-mt.so.3
#39 0x49e0359d in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#40 0x49ded7a7 in QApplication::enter_loop () from /usr/qt/3/lib/libqt-mt.so.3
#41 0x49d9ebd2 in QDragManager::drag () from /usr/qt/3/lib/libqt-mt.so.3
#42 0x49dfaed4 in QDragObject::drag () from /usr/qt/3/lib/libqt-mt.so.3
#43 0x49dfac91 in QDragObject::dragCopy () from /usr/qt/3/lib/libqt-mt.so.3
#44 0x4a9d43e8 in KListView::contentsMouseMoveEvent ()
   from /usr/kde/3.5/lib/libkdeui.so.4
#45 0x49f50ed3 in QScrollView::viewportMouseMoveEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#46 0x49f4e5cd in QScrollView::eventFilter () from /usr/qt/3/lib/libqt-mt.so.3
#47 0x49f1f66b in QListView::eventFilter () from /usr/qt/3/lib/libqt-mt.so.3
#48 0x081cab58 in UMLListView::eventFilter ()
#49 0x49e480fe in QObject::activate_filters ()
   from /usr/qt/3/lib/libqt-mt.so.3
#50 0x49e48159 in QObject::event () from /usr/qt/3/lib/libqt-mt.so.3
#51 0x49e7e2c4 in QWidget::event () from /usr/qt/3/lib/libqt-mt.so.3
#52 0x49dedcec in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#53 0x49dee9d7 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#54 0x4a484a6b in KApplication::notify ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#55 0x49d91e49 in QETWidget::translateMouseEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#56 0x49d91741 in QApplication::x11ProcessEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#57 0x49da0b1f in QEventLoop::processEvents ()
   from /usr/qt/3/lib/libqt-mt.so.3
#58 0x49e0359d in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#59 0x49e03442 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#60 0x49ded81d in QApplication::exec () from /usr/qt/3/lib/libqt-mt.so.3
#61 0x081fe7ca in main ()

My system info:
System uname: 2.6.20-gentoo-r8 i686 Intel(R) Pentium(R) 4 CPU 2.66GHz
Gentoo Base System release 1.12.9
Timestamp of tree: Sun, 03 Jun 2007 11:50:01 +0000
dev-java/java-config: 1.3.7, 2.0.32
dev-lang/python:     2.4.4-r4
dev-python/pycrypto: 2.0.1-r5
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.16.1-r3
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.17-r2
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=pentium4 -O3 -pipe"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="-march=pentium4 -O3 -pipe"
LANG="ru_RU.UTF-8"
LC_ALL="ru_RU.UTF-8"
LINGUAS="ru en"
MAKEOPTS="-j2"