warning: Invalid argument supplied for foreach() in

I get the following error on every page that uses the CCK 'image' type. I'm using imagecache, image field and cck along with views to create image galleries.

The taxonomy driven image gallery views seem to work ok. But clicking on the actual image node gives the error below:

    * warning: Invalid argument supplied for foreach() in /var/www/drupal-5.3-new/sites/all/modules/views/views_query.inc on line 81.
    * warning: Invalid argument supplied for foreach() in /var/www/drupal-5.3-new/sites/all/modules/views/views_query.inc on line 16.
    * warning: Invalid argument supplied for foreach() in /var/www/drupal-5.3-new/sites/all/modules/views/views_query.inc on line 195.

Not being a programmer, I'm not sure how to debug this? I've checked the views I've got set up and cannot see any errors, similarly I've checked the imagecache and cck image content type settings also.