If you do svn up in trunk, you will see a huge patch landing.
This is adaptation of the python 2.7 syntax to python 3.2.
Gramps does not run yet on 3.2 though, that will be more work.
Also, some things in trunk python 2.7 will be broken, I wanted this huge patch out however, as during testing I need to fix as many GTK 3 things as python 3 things :-)
For coding in trunk in the future, please don't break python 3.2 syntax, so no u'string', no iteritems or other iter friends, no xrange, add list(..) around things that are iterator in 3.2, ...
For an overview of coding things, help update: http://www.gramps-project.org/wiki/index.php?title=GEPS_031:_Python_3_support
If you want a look at the total patchset: see attached file to bug ticket http://www.gramps-project.org/bugs/view.php?id=2620