Comment 5 for bug 1204732

Reproduced eggbot extension with Inkscape 0.48.4 and 0.48+devel r12442 on OS X 10.7.5 - if using Inkscape with most recent versions of dependencies (same inkscape versions compiled and running with older versions of dependencies do not crash):

$ port installed glib2 glibmm gtk2 gtkmm gettext intltool libsigcxx2 | grep active
  gettext @0.18.3_0 (active)
  glib2 @2.36.3_2 (active)
  glibmm @2.36.2_0 (active)
  gtk2 @2.24.20_103+git_patches+no_x11+quartz (active)
  gtkmm @2.24.4_0+quartz (active)
  intltool @0.50.2_2+perl5_12 (active)
  libsigcxx2 @2.2.11_0 (active)

Backtrace from current trunk (12442) attached.