Application that crashed: umbrello
Version of the application: 2.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
On Ubuntu 9.10 - Changing Class Package On Ok Click: Crash (Workaround: Apply Click & Close)

 -- Backtrace:
Application: Umbrello UML Modeller (umbrello), signal: Segmentation fault
[KCrash Handler]
#6  0x0873e8fc in ?? ()
#7  0x020a5bf8 in Q3ScrollView::viewportMouseDoubleClickEvent(QMouseEvent*) () from /usr/lib/libQt3Support.so.4
#8  0x020a7859 in Q3ScrollView::eventFilter(QObject*, QEvent*) () from /usr/lib/libQt3Support.so.4
#9  0x0204405b in Q3ListView::eventFilter(QObject*, QEvent*) () from /usr/lib/libQt3Support.so.4
#10 0x0193a83a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#11 0x00f7ef2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00f87033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00c9ebfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#14 0x0193b6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00f85f6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#16 0x00ff47c0 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00ff3c4b in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#18 0x01020502 in ?? () from /usr/lib/libQtGui.so.4
#19 0x01a67e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#20 0x01a6b730 in ?? () from /lib/libglib-2.0.so.0
#21 0x01a6b863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#22 0x0196602c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0x0101fbe5 in ?? () from /usr/lib/libQtGui.so.4
#24 0x01939c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x0193a0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#26 0x0193c53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#27 0x00f7edd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#28 0x086ec2b5 in ?? ()
#29 0x008f9b56 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#30 0x08073461 in _start ()

Reported using DrKonqi