qscintilla2 version 2.4.5-1 failed to build in oneiric

qscintilla2 version 2.4.5-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2709885

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/2709885/+files/buildlog_ubuntu-oneiric-i386.qscintilla2_2.4.5-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1406 lines into the build log:

dpkg-deb: building package `libqscintilla2-doc' in `../libqscintilla2-doc_2.4.5-1_all.deb'.
make[1]: Leaving directory `/build/buildd/qscintilla2-2.4.5'
/usr/bin/make -f debian/rules DH_OPTIONS=-a binary-common
pyversions: missing X(S)-Python-Version in control file, fall back to debian/pyversions
pyversions: missing debian/pyversions file, fall back to supported versions
make[1]: Entering directory `/build/buildd/qscintilla2-2.4.5'
dh_testdir
dh_testroot
dh_installman
dh_install --sourcedir=/build/buildd/qscintilla2-2.4.5/debian/tmp
dh_install: libqscintilla2-designer missing files (usr/lib/qt4/plugins/*), aborting
make[1]: *** [binary-common] Error 2
make[1]: Leaving directory `/build/buildd/qscintilla2-2.4.5'
make: *** [binary-arch] Error 2
dpkg-buildpackage: error: /usr/bin/fakeroot debian/rules binary gave error exit status 2
******************************************************************************
Build finished at 20110818-1320
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/qscintilla2-2.4.5