xca version 0.9.0-1ubuntu2 failed to build in oneiric

xca version 0.9.0-1ubuntu2 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2715105

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2715105/+files/buildlog_ubuntu-oneiric-amd64.xca_0.9.0-1ubuntu2_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 7755 lines into the build log:

xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0x18): undefined reference to `QItemDelegate::qt_metacast(char const*)'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0x20): undefined reference to `QItemDelegate::qt_metacall(QMetaObject::Call, int, void**)'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0x40): undefined reference to `QItemDelegate::eventFilter(QObject*, QEvent*)'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0x70): undefined reference to `QItemDelegate::paint(QPainter*, QStyleOptionViewItem const&, QModelIndex const&) const'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0x78): undefined reference to `QItemDelegate::sizeHint(QStyleOptionViewItem const&, QModelIndex const&) const'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0xa0): undefined reference to `QItemDelegate::editorEvent(QEvent*, QAbstractItemModel*, QStyleOptionViewItem const&, QModelIndex const&)'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0xa8): undefined reference to `QItemDelegate::drawDisplay(QPainter*, QStyleOptionViewItem const&, QRect const&, QString const&) const'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0xb0): undefined reference to `QItemDelegate::drawDecoration(QPainter*, QStyleOptionViewItem const&, QRect const&, QPixmap const&) const'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0xb8): undefined reference to `QItemDelegate::drawFocus(QPainter*, QStyleOptionViewItem const&, QRect const&) const'
xca.o:(.rodata._ZTV13comboDelegate[vtable for comboDelegate]+0xc0): undefined reference to `QItemDelegate::drawCheck(QPainter*, QStyleOptionViewItem const&, QRect const&, Qt::CheckState) const'
collect2: ld returned 1 exit status
make[1]: *** [xca] Error 1
make[1]: Leaving directory `/build/buildd/xca-0.9.0'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110824-0600
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/xca-0.9.0