Hi All, I thought it would be worth mentioning that we need to get rid of all direct access to private fields of objects as part of our GTK+ 3 migration. i.e. foo->bar = bar_val; // NO!! gtk_foo_set_bar (foo, bar_val); //Yes! bar_val = foo->bar; // NO!! bar_val = gtk_foo_get_bar (foo); //Yes! To check for these issues, you can compile inkscape with: make CFLAGS+="-DGSEAL_ENABLE" CXXFLAGS+="-DGSEAL_ENABLE" Note that there are probably hundreds of such problems, so any help with the cleanup would be appreciated! Usually there is a suitable GTK/GDK accessor function to fix the problem. Sometimes (e.g. [1]) there isn't, which I guess implies that we're doing something the "wrong" way. Cheers, Alex [1] https://bugs.launchpad.net/inkscape/+bug/911174