[MonoDevelop] FC3 + monodevelop 0.7 crashes when try to add GAC reference

[Simon Godden]

Using monodevelop 0.7 on FC3, I get the following when I try to add a
reference to e.g. System.Web (or any GAC assembly).

(MonoDevelop:15289): Gtk-CRITICAL **: file gtktreestore.c: line 639
(gtk_tree_store_get_value): assertion `iter->stamp == GTK_TREE_STORE
(tree_model)->stamp' failed
/usr/bin/mono: symbol lookup error: /usr/lib/libglibsharpglue-2.so:
undefined symbol: g_return_if_fail_warning

Any ideas?  This also used to happen on 0.5.

Simon