Fixed undefined index in panels_subsites_token_values() on PHP 5.3.
Fixed weight based ref. field sorting
Added db update function to rename nodetype to node_type
The following commits have been added to this release.
Fixed slug overview page saving of slug values. Fixed index key mix-up in field_ref settings form. Fixed field_ref settings error, with content type types.
Development release
First official release of panels sub-sites also known, under development, as panels slugs.