gebabbel version 0.4+repack-0ubuntu1 failed to build on i386

gebabbel version 0.4+repack-0ubuntu1 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393360

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2393360/+files/buildlog_ubuntu-natty-i386.gebabbel_0.4%2Brepack-0ubuntu1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1066 lines into the build log:

make[1]: Entering directory `/build/buildd/gebabbel-0.4+repack'
/usr/bin/uic-qt4 ui/MainWindow.ui -o ui/ui_MainWindow.h
/usr/bin/uic-qt4 ui/IOConfig.ui -o ui/ui_IOConfig.h
/usr/bin/uic-qt4 ui/FilterConfig.ui -o ui/ui_FilterConfig.h
/usr/bin/uic-qt4 ui/PreferencesConfig.ui -o ui/ui_PreferencesConfig.h
/usr/bin/uic-qt4 ui/SavePresetWindow.ui -o ui/ui_SavePresetWindow.h
g++ -c -O0 -g3 -O2 -D_REENTRANT -Wall -W -DLINUX -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -Imoc -Iui -o obj/main.o src/main.cpp
g++ -c -O0 -g3 -O2 -D_REENTRANT -Wall -W -DLINUX -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -Imoc -Iui -o obj/MyMainWindow.o src/MyMainWindow.cpp
src/MyMainWindow.cpp: In member function 'void MyMainWindow::setupMenus()':
src/MyMainWindow.cpp:222:50: error: cannot call constructor 'QSize::QSize' directly
src/MyMainWindow.cpp:222:50: error: for a function-style cast, remove the redundant '::QSize'
make[1]: *** [obj/MyMainWindow.o] Error 1
make[1]: Leaving directory `/build/buildd/gebabbel-0.4+repack'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1913
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/gebabbel-0.4+repack