fails to build in maverick and in a test rebuild:
https://launchpad.net/ubuntu/+archive/test-rebuild-20100628/+build/1839518
Making all in Farsight
make[5]: Entering directory `/build/buildd/telepathy-qt4-0.3.2/TelepathyQt4/Farsight'
\
# source='channel.cpp' object='channel.lo' libtool=yes
/bin/bash ../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I../.. -DBUILDING_TELEPATHY_QT4_FARSIGHT -I../.. -I../.. -DQT_SHARED -I/usr/include/qt4 -I/usr/include/qt4/QtCore -DQT_SHARED -I/usr/include/qt4 -I/usr/include/qt4/QtDBus -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtXml -pthread -I/usr/include/telepathy-1.0 -I/usr/include/dbus-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/dbus-1.0/include -pthread -I/usr/include/telepathy-1.0 -I/usr/include/dbus-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/gstreamer-0.10 -I/usr/lib/dbus-1.0/include -I/usr/include/libxml2 -I../.. -I../.. -Wall -Wextra -Wsign-compare -Wpointer-arith -Wformat-security -Winit-self -Wno-missing-field-initializers -Wno-unused-parameter -DQT_NO_CAST_FROM_ASCII -fvisibility=hidden -g -O2 -g -Wall -O2 -c -o channel.lo channel.cpp
libtool: compile: g++ -DHAVE_CONFIG_H -I. -I../.. -DBUILDING_TELEPATHY_QT4_FARSIGHT -I../.. -I../.. -DQT_SHARED -I/usr/include/qt4 -I/usr/include/qt4/QtCore -DQT_SHARED -I/usr/include/qt4 -I/usr/include/qt4/QtDBus -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtXml -pthread -I/usr/include/telepathy-1.0 -I/usr/include/dbus-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/dbus-1.0/include -pthread -I/usr/include/telepathy-1.0 -I/usr/include/dbus-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/gstreamer-0.10 -I/usr/lib/dbus-1.0/include -I/usr/include/libxml2 -I../.. -I../.. -Wall -Wextra -Wsign-compare -Wpointer-arith -Wformat-security -Winit-self -Wno-missing-field-initializers -Wno-unused-parameter -DQT_NO_CAST_FROM_ASCII -fvisibility=hidden -g -O2 -g -Wall -O2 -c channel.cpp -fPIC -DPIC -o .libs/channel.o
In file included from /usr/include/glib-2.0/gio/gio.h:49,
from /usr/include/telepathy-1.0/telepathy-glib/proxy.h:26,
from /usr/include/telepathy-1.0/telepathy-glib/connection.h:29,
from /usr/include/telepathy-1.0/telepathy-glib/channel.h:25,
from /usr/include/telepathy-1.0/telepathy-farsight/channel.h:6,
from ../../TelepathyQt4/Farsight/channel.h:33,
from ../../TelepathyQt4/Farsight/Channel:8,
from channel.cpp:22:
/usr/include/glib-2.0/gio/gdbusintrospection.h:151: error: expected unqualified-id before 'protected'
/usr/include/glib-2.0/gio/gdbusintrospection.h:151: error: expected ';' before 'protected'
make[5]: *** [channel.lo] Error 1
make[5]: Leaving directory `/build/buildd/telepathy-qt4-0.3.2/TelepathyQt4/Farsight'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory `/build/buildd/telepathy-qt4-0.3.2/TelepathyQt4'
make[3]: *** [all] Error 2
This seems to have already been fixed in the maverick archive. I just did a successful rebuild.