I'm testing these current builds now.
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Installing the packages under Windows XP 32bit
Gramps 3.2.0
Python 2.6.5
gtk2-runtime-2.16.6-2010-02-24-ash.exe
pygtk-2.12.1-3.win32-py2.6.exe
pygobject-2.14.2-2.win32-py2.6.exe
pycairo-1.4.12-2.win32-py2.6.exe
doesn't work!
Installer doesn't detect GTK, but anyway after installing GRAMPS, python reports error when doing "import gtk" or "import gobject"