When adding a new image to a node, safari doesn't show the image list and the full columns structure gets disrupted (firefox and iexplorer look fine). This is due to a missing closing div tag in the function theme_node_images_form_upload(&$form), in node_images.pages.inc file:

$output .= '<div style="clear:both;">';

should be

$output .= '<div style="clear:both;"></div>';