Version:           1.5.1 (using KDE KDE 3.5.2)
Installed from:    Gentoo Packages
Compiler:          gcc-3.4.6 
OS:                Linux

Umbrello crashes when multiple objects are copied and then pasted

This bug was also reproduced on umbrello 1.5.4 by a friend of mine.

Steps to reproduce:
1. Create any diagram with two objects of any type
2. Select these two objects _by dragging a rectangle with mouse around them_
3. Copy to clipboard
4. Paste
5. Kaboom

Using host libthread_db library "/lib/libthread_db.so.1".
(no debugging symbols found)
`system-supplied DSO at 0xffffe000' has disappeared; keeping its symbols.
[Thread debugging using libthread_db enabled]
[New Thread -1233598144 (LWP 30586)]
[KCrash handler]
#6  0x081b3dbe in AssociationWidget::operator== ()
#7  0x081b46c7 in UMLView::addAssociation ()
#8  0x08278c64 in UMLClipboard::pasteClip4 ()
#9  0x0827b1cf in UMLClipboard::paste ()
#10 0x08149354 in UMLApp::slotEditPaste ()
#11 0x081e2c0b in UMLView::slotMenuSelection ()
#12 0x081e3b6e in UMLView::qt_invoke ()
#13 0xb6f54420 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#14 0xb6f54e7d in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#15 0xb7278378 in QPopupMenu::activated () from /usr/qt/3/lib/libqt-mt.so.3
#16 0xb704bd70 in QPopupMenu::actSig () from /usr/qt/3/lib/libqt-mt.so.3
#17 0xb704c2ef in QPopupMenu::mouseReleaseEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#18 0xb7852947 in KPopupMenu::mouseReleaseEvent ()
   from /usr/kde/3.5/lib/libkdeui.so.4
#19 0xb6f89756 in QWidget::event () from /usr/qt/3/lib/libqt-mt.so.3
#20 0xb6ef9ebc in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#21 0xb6efaba7 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#22 0xb76488ef in KApplication::notify ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#23 0xb6e9f36f in QETWidget::translateMouseEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#24 0xb6e9e341 in QApplication::x11ProcessEvent ()
   from /usr/qt/3/lib/libqt-mt.so.3
#25 0xb6ead39f in QEventLoop::processEvents ()
   from /usr/qt/3/lib/libqt-mt.so.3
#26 0xb6f0f76d in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#27 0xb6f0f612 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#28 0xb6ef99ed in QApplication::exec () from /usr/qt/3/lib/libqt-mt.so.3
#29 0x08206092 in main ()