Image module failing on Preview because of a blank node id

I am getting failure during the preview stage of adding an image (as a node). (IE I found a file I wish to upload via the image field, filled in the other fields and then hit the preview button)

I am getting an error like the following

SELECT image_list FROM image WHERE nid = ' '

which when I track it back to the query in image.module I find it appears to be inside this function

function _image_add_static($node, $res)

where

the $node->nid value is not set.

(this is used in the Select statement where clause above as the value for nid).

Not sure where to go now on this.