Just wanted to add that i too experience this issue, which i've worked around by renaming:
/usr/lib/x86_64-linux-gnu/qt4/plugins/accessiblebridge/libqspiaccessiblebridge.so to: /usr/lib/x86_64-linux-gnu/qt4/plugins/accessiblebridge/.libqspiaccessiblebridge.so(i can't simply uninstall the qt-at-spi package, as that's transitively a dependency of gnome-core.)
Alexis.
