Comment 18 for bug 1046068

Ideally, it would be nice to be able to suppress the error messages internally, similar to how it is done for command line usage:

<quote>
    Glib::ustring stderr_data = fileerr.string();
    if (stderr_data.length() != 0 &&
        inkscape_use_gui()
       ) {
        checkStderr(stderr_data, Gtk::MESSAGE_INFO,
                                 _("Inkscape has received additional data from the script executed. "
                                   "The script did not return an error, but this may indicate the results will not be as expected."));
    }
</quote>
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/view/head:/src/extension/implementation/script.cpp#L1033>

Such a solution might also be helpful to prevent bug #418242 from interrupting workflows on linux.