Version:           1.4.0-beta1 (using KDE KDE 3.3.1)
Installed from:    Compiled From Sources
Compiler:          g++ (GCC) 3.3.5 (Debian 1:3.3.5-5) 
OS:                Linux

Hello,

i'm using the current beta version compiled out of umbrello-1.4.0beta1.tar.bz2 (date: 2005-01-15 05:07). The application show the version number 1.3.90.
Do the following steps to reproduce:

1. Start the application with a blank diagram
2. Insert a class
3. Undo the insert (press undo-button in the toolbar)
4. Redo (press redo-button in the toolbar) --> here Umbrello immediately crashes

Following backtrace from KCrash:

Using host libthread_db library "/lib/tls/libthread_db.so.1".
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
[Thread debugging using libthread_db enabled]
[New Thread 1096556288 (LWP 30809)]
[KCrash handler]
#3  0x412ed048 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string () from /usr/lib/libstdc++.so.5
#4  0x081974bb in UMLDoc::loadRedoData ()
#5  0x0817a4e0 in UMLApp::slotEditRedo ()
#6  0x0817e434 in UMLApp::qt_invoke ()
#7  0x40cab52c in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#8  0x40cab354 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#9  0x4056bc8b in KAction::activated () from /usr/lib/libkdeui.so.4
#10 0x4056b65f in KAction::slotActivated () from /usr/lib/libkdeui.so.4
#11 0x4056be91 in KAction::qt_invoke () from /usr/lib/libkdeui.so.4
#12 0x40cab4a6 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#13 0x40cab354 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#14 0x40ff028e in QButton::clicked () from /usr/lib/libqt-mt.so.3
#15 0x40d3d97a in QButton::mouseReleaseEvent () from /usr/lib/libqt-mt.so.3
#16 0x40ce1697 in QWidget::event () from /usr/lib/libqt-mt.so.3
#17 0x40c4ebcf in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#18 0x40c4e2c4 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#19 0x407e2da3 in KApplication::notify () from /usr/lib/libkdecore.so.4
#20 0x40be3640 in QETWidget::translateMouseEvent () from /usr/lib/libqt-mt.so.3
#21 0x40be12ce in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#22 0x40bf81a4 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#23 0x40c60f28 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#24 0x40c60dd8 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#25 0x40c4ee21 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#26 0x08152254 in main ()


Even in more complex diagrams the problem appears.
I also compiled the version 1.3.2 from sources. In this version I cannot produce the error.