[Evolution] Crash sending mail

[Kenneth Porter <shiva well com>]

Using 1.0.1. I had just clicked the send button on the composer for a
message with an HTML attachment and the mail component shut down. I had
been running with --debug so here's what looks like the relevant
section:

GnomeVFS-CRITICAL **: file gnome-vfs-file-info.c: line 91
(gnome_vfs_file_info_unref): assertion `info->refcount > 0' failed.

** CRITICAL **: file glade-xml.c: line 534 (glade_xml_get_widget):
assertion `self != NULL' failed.

Gtk-CRITICAL **: file gtkwidget.c: line 1387 (gtk_widget_destroy):
assertion `widget != NULL' failed.

Gtk-WARNING **: invalid cast from (NULL) pointer to `GtkObject'

Gtk-CRITICAL **: file gtkobject.c: line 1171 (gtk_object_unref):
assertion `object != NULL' failed.