This is a semi-automatic report based on the latest archive rebuild results [1].
Apologies if it reaches you in error.
Excerpt from the buildlog:
/bin/bash ../../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gstreamermm\" -DGSTREAMERMM_BUILD=1 -pthread -I/usr/include/giomm-2.4 -I/usr/lib/i386-linux-gnu/giomm-2.4/include -I/usr/include/glibmm-2.4 -I/usr/lib/i386-linux-gnu/glibmm-2.4/include -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/sigc++-2.0 -I/usr/lib/i386-linux-gnu/sigc++-2.0/include -I/usr/include/libxml2 -I/usr/include/gstreamer-0.10 -I/usr/include/libxml++-2.6 -I/usr/lib/libxml++-2.6/include -D_FORTIFY_SOURCE=2 -Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -Wall -c -o preset.lo preset.cc
libtool: compile: g++ -DHAVE_CONFIG_H -I.. -I../.. -DG_LOG_DOMAIN=\"gstreamermm\" -DGSTREAMERMM_BUILD=1 -pthread -I/usr/include/giomm-2.4 -I/usr/lib/i386-linux-gnu/giomm-2.4/include -I/usr/include/glibmm-2.4 -I/usr/lib/i386-linux-gnu/glibmm-2.4/include -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/sigc++-2.0 -I/usr/lib/i386-linux-gnu/sigc++-2.0/include -I/usr/include/libxml2 -I/usr/include/gstreamer-0.10 -I/usr/include/libxml++-2.6 -I/usr/lib/libxml++-2.6/include -D_FORTIFY_SOURCE=2 -Wall -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -Wall -c preset.cc -fPIC -DPIC -o .libs/preset.o
In file included from /usr/include/glibmm-2.4/glibmm.h:87:0,
from ../gstreamermm/preset.h:7,
from preset.cc:4:
/usr/include/glibmm-2.4/glibmm/thread.h: In member function 'T* Glib::StaticPrivate<T>::get()':
/usr/include/glibmm-2.4/glibmm/thread.h:1067:26: warning: 'void* g_static_private_get(GStaticPrivate*)' is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:245): Use 'g_private_get' instead [-Wdeprecated-declarations]
/usr/include/glibmm-2.4/glibmm/thread.h: In member function 'void Glib::StaticPrivate<T>::set(T*, Glib::StaticPrivate<T>::DestroyNotifyFunc)':
/usr/include/glibmm-2.4/glibmm/thread.h:1073:3: warning: 'void g_static_private_set(GStaticPrivate*, gpointer, GDestroyNotify)' is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:248): Use 'g_private_set' instead [-Wdeprecated-declarations]
/usr/include/glibmm-2.4/glibmm/thread.h: In constructor 'Glib::Private<T>::Private(Glib::Private<T>::DestructorFunc)':
/usr/include/glibmm-2.4/glibmm/thread.h:1089:13: warning: 'GPrivate* g_private_new(GDestroyNotify)' is deprecated (declared at /usr/include/glib-2.0/glib/deprecated/gthread.h:231) [-Wdeprecated-declarations]
In file included from ../gstreamermm/preset.h:28:0,
from preset.cc:4:
/usr/include/gstreamer-0.10/gst/gstpreset.h: At global scope:
/usr/include/gstreamer-0.10/gst/gstpreset.h:76:26: error: 'GST_PADDING' was not declared in this scope
make[3]: *** [preset.lo] Error 1
make[3]: Leaving directory `/build/buildd/gstreamermm-0.10.9/gstreamer/gstreamermm'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/gstreamermm-0.10.9'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/gstreamermm-0.10.9'
make: *** [debian/stamp-makefile-build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20120206-0403
FAILED [dpkg-buildpackage died]
The full buidlog can be found at https://launchpad.net/ubuntu/+archive/test-rebuild-20120201/+build/3148722/+files/buildlog_ubuntu-precise-i386.gstreamermm_0.10.9-1_FAILEDTOBUILD.txt.gz.
[1] http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20120201-precise.html
Builds fine now.