Version:           1.5.6 (using KDE KDE 3.5.6)
Installed from:    Ubuntu RPMs

I've just found out that certain steps taken while drawing a state diagram crashes umbrello. To reproduce the crash a user only needs to:

1) open umbrello
2) create a new state diagram
3) add the initial state
4) add a state
5) connect the initial state to the state with a state transition arrow
6) crash

Here is the backtrace:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1234630992 (LWP 5830)]
[KCrash handler]
#6  0x0810aea9 in UMLObject::setUMLPackage ()
#7  0x081d7660 in ToolBarStateAssociation::addAssociationInViewAndDoc ()
#8  0x081d78a7 in ToolBarStateAssociation::setSecondWidget ()
#9  0x08111664 in ToolBarState::mouseRelease ()
#10 0xb787afcf in QScrollView::viewportMouseReleaseEvent ()
   from /usr/lib/libqt-mt.so.3
#11 0xb787c566 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#12 0xb7744f04 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#13 0xb7744f82 in QObject::event () from /usr/lib/libqt-mt.so.3
#14 0xb777c65b in QWidget::event () from /usr/lib/libqt-mt.so.3
#15 0xb76dcb88 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#16 0xb76ded46 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#17 0xb7e6cc82 in KApplication::notify (this=0xbf812a68, receiver=0x85ede48, 
    event=0xbf8124d0)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/kapplication.cpp:550
#18 0xb766f3fd in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#19 0xb766e062 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#20 0xb766c14c in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#21 0xb7683320 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#22 0xb76f725e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#23 0xb76f706e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#24 0xb76de731 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#25 0x081beb17 in main ()