Version:           1.5.52 (using KDE KDE 3.5.5)
Installed from:    SuSE RPMs

I created an XMI file on a notebook, and it crashes when opened on another computer, here is the backtrace (hope this helps):
Systeemconfiguratie opstartcontrole uitgeschakeld.

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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 -1232853296 (LWP 4971)]
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[KCrash handler]
#9  0x081c8b34 in UMLDoc::loadExtensionsFromXMI ()
#10 0x081ce752 in UMLDoc::loadFromXMI ()
#11 0x081d636a in UMLDoc::openDocument ()
#12 0x081d6c6f in UMLApp::slotFileOpen ()
#13 0x081d6e02 in UMLApp::qt_invoke ()
#14 0xb70853ad in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#15 0xb7085fed in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0xb786eb59 in KAction::activated () from /opt/kde3/lib/libkdeui.so.4
#17 0xb78a3fd2 in KAction::slotActivated () from /opt/kde3/lib/libkdeui.so.4
#18 0xb796f1ed in KAction::slotPopupActivated ()
   from /opt/kde3/lib/libkdeui.so.4
#19 0xb796f4b1 in KAction::qt_invoke () from /opt/kde3/lib/libkdeui.so.4
#20 0xb70853ad in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0xb73be98e in QSignal::signal () from /usr/lib/qt3/lib/libqt-mt.so.3
#22 0xb70a1477 in QSignal::activate () from /usr/lib/qt3/lib/libqt-mt.so.3
#23 0xb718b307 in QPopupMenu::mouseReleaseEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#24 0xb787781e in KPopupMenu::mouseReleaseEvent ()
   from /opt/kde3/lib/libkdeui.so.4
#25 0xb70be190 in QWidget::event () from /usr/lib/qt3/lib/libqt-mt.so.3
#26 0xb7026627 in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#27 0xb7027621 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0xb76afa42 in KApplication::notify () from /opt/kde3/lib/libkdecore.so.4
#29 0xb6fc69f9 in QETWidget::translateMouseEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#30 0xb6fc501f in QApplication::x11ProcessEvent ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0xb6fd591a in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#32 0xb703d0c0 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0xb703cf56 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#34 0xb7025fef in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#35 0x081d79ac in main ()