Problem with imagefield gallery option

I am trying to utilize the imagefield gallery option specifically
with the 'gallery per post' setting.

This will not work as expected if one or more imagefields used
on a page are not part of the page via a node_load but present
perhaps via Views or some other form.

Basically in these cases there is no 'nid' present in the $items array
which is what is checked in the function that implements the
imagefield gallery.

The attached patch adds a check to see if the 'nid' is present via the
$node object if there is no 'nid' via the $item context.

This is in thickbox_field_formatter() function.